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4

Chapter 1: Ov

EMC VPLEX DImplementat

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V

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This

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6

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8

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12

Chapter 2: Da


Extent M

Device M

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nical Notes

ess of non-dit migration s

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a Mobility

ng multiple

ity and

r ware

ocate onous

th

gator

is llows for

ctor.

pped nd target

ctual t for

14

Chapter 3: Da


ta Migrations


This

Abo

One

Mig

Bat

Abo


s chapter pre

out Data Mig

e Time Migra

gration Limita

tch Migration

out Rebuilds

ons ractices Tech

esents the fo

grations ........

ations ..........

ations .........

ns ................

...................

nical Notes

Cha

llowing topic

....................

....................

....................

....................

....................

apter 3

cs:

...................

...................

...................

...................

...................

Data

....................

....................

....................

....................

....................

Migrati

...................

...................

...................

...................

...................

ions

......... 15

......... 15

......... 15

......... 16

......... 16

A

About Da

One Time

Migratio

ata Migra

The

Onemig

Batdev

e Migrati

One

ExteUse

Devon oor b

on Limitat

Notesyncsign

ations

ere are two ty

e time migratgration start”

tch migrationvice or extent

ions

e time migrat

ent migratioe extent migr

Move exte

Defragme

Perform mvolumes w

vice migratio other devicesbetween devi

Migrate da

Relocate a

Relocate d

tions

Device mi

Devices mmigrated.

Target devIf the targusing stor

Target dev

e: When migrachronous. If thnificant perform

ypes of data m

tions - Begin command is

ns - Are run at migrations c

tions include

ns - Extent mations to:

ents from a “

nt a storage

migrations wh with identica

ns - Devices s. Device migices on differ

ata between

a “hot” volum

devices to ne

grations betw

must be remo

vice must be et is larger inrage volume

vice must no

ating betweenhere is I/O to tmance impact

migrations:

an extent ors used.

as batch jobs can be execu

e:

migrations mo

hot” storage

volume to cr

here the sourl capacities

are RAID 0, Rgrations movrent clusters.

dissimilar ar

me to a faste

ew arrays in a

ween distrib

oved from con

the same sizn size than th expansion.

t have any ex

clusters reme the devices bet to your enviro

r device migr

s using re-usauted using a

ove data betw

e volume sha

reate more co

rce and targe

RAID 1, or RAve data betwe. Use device

rrays

r array

a different clu

uted devices

nsistency gro

ze or larger the source, th

xisting volum

ember that all eing migrated,onment.

Chap

ration immed

able migratio single comm

ween extents

red by other

ontiguous fre

et have the sa

AID C deviceseen devices migrations to

uster

s are not sup

oups before t

han the soure extra space

mes on it.

device migrat, any latency m

pter 3: Data M

diately when

on plan files. mand.

s in the same

busy extents

ee space

ame number

s built on ext on the sameo:

ported.

they can be

rce device or e can be utili

tions are may have a

Migrations

the “dm

Multiple

e cluster.

s

r of

ents or cluster

r extent. ized

16

A

t

Chapter 3: Da


Batch Mi

About Re

General procto perform dmigration

ta Migrations


igrations

Bataut

Up mig

Note

Use

1

2

3

4

5

6

7

ebuilds

Rebaris

The

Locvolu

cedure ata


s

ch migrationomate routin

Use batchthe sourcecapacities

Use batchconfigure source arrVPLEX Geo

to 25 local agrations beyo

e: Devices mu

e the followin

. Create a

. Start the

. Monitor

. Pause, r

. Commit volume/

If the vircommittdevice.

. Clean up

For exteextent a

. Remove

builds synchrse between le

ere are two ty

A full rebu

A logging

al mirrors areumes).

ons ractices Tech

ns migrate mune tasks:

hed extent me and destinas.

hed device m the destinatray), and to mo.

nd 25 distribond those lim

ust be removed

ng general ste

and check a m

e migration.

the migratio

resume, or ca

the migratio/device/exte

rtual volume ting a device

p (optional).

nt migrationsnd unclaim i

the record o

ronize data fregs of a RAID

ypes of rebuil

uild copies th

rebuild copie

e updated us

nical Notes

ultiple extent

igrations to mation have th

igrations to mion’s capacit

migrate devic

buted migratimits are queu

d from consist

eps to perfor

migration pla

on’s progress

ancel the mig

on. Commit trnt to the targ

on top of a d migration re

s: dismantle ts storage-vo

of the migrati

rom a sourceD, a rebuild u

ld behavior:

he entire con

es only chan

sing a full reb

ts or devices

migrate arrayhe same num

migrate to dities to matchces between

ions can be iued until an e

tency groups b

rm extent and

an (batch mig

s.

gration (optio

ransfers the sget.

device has a enames the v

the source dolume.

on.

e drive to a tapdates the o

tents of the s

ged blocks f

build (local d

s. Create batc

ys within the mber of LUNs

issimilar arrah the capacity clusters in a

in progress aexisting migra

before they ca

d device mig

grations only

onal).

source virtua

system-assigvirtual volum

devices or de

arget drive. Wout-of-date le

source to the

from the sour

devices do no

ch migrations

same cluste and identica

ays (user musy and tier of VPLEX Metro

at the same tiation comple

an be migrated

grations:

y).

al

gned defaulte after the ta

estroy the sou

When differeneg.

e target.

rce to the tar

ot use loggin

s to

er where al

st the o or

ime. Any etes.

d.

name, arget

urce

nces

rget.

g

S

Rebuilds for Provisioned Storage

In Vlogglink

Aftevolu

Logbec

If a out

Thesystsuc

Noterebu

Thinwhi

Thinsim

VPLdetwhethinprovclai

Noteto VSystthincomallowritresu

Thin

VPLEX Metro aging volume.

k outage.

er a link or leumes to sync

gging volumecomes unreac

logging volu-of-date (via

e unavailabilitem reads th

cceeded on a

e: If no logginguild of every d

n provisioninile allocating

nly provisionmilar consump

LEX preservesecting zeroedere it would cn provisioninvisioned, theming.

e: If a thinly pVPLEX, the perftem volumes a

n storage pool mpete for this s

cation pool ruing to a thinly

ulting in data u

and Geo con. Logging vol

g is restoredchronize mirr

rebuilds alschable, but r

me is unava the log), the

ity of a loggine logging vonother (when

g volume is avistributed dev

ng allows stog the minimal

ed storage vption of thin

s the unallocd data conte

cause an unng for each ba

e "thin-rebuil

rovisioned stoformance of th

are supported resources ava

space with useuns out of spacy provisioned d unavailability

figurations, aumes keep tr

, the VPLEX srors by sendi

o occur whenrecovers quic

ilable at the leg is marke

ng volume mlume) and atn the system

vailable, an invice to which t

rage to migral amount of t

volumes can storage pool

cated thin pont before wri

necessary allack-end storald" attribute

orage volume che migration od on thinly provailable, at maxer-data volumce and this is

device causes

all distributerack of block

system uses ng only chan

n a leg of a dckly.

time that a leed as fully ou

atters both at the time tha

m begins write

ter-cluster lin there were wri

ate onto a th thin storage p

be incorporal capacity.

ol space of titing, and sulocation. VPLage volume. must be to "t

contains non-or initial RAID 1visioned LUNsximum capaci

mes in the sam the last reduns the volume to

Chap

ed devices haks written du

the informatnged blocks a

disaster recov

eg is scheduut-of-date, ca

at the time ofat a write failes to the logg

k restoration wtes while the

inly provisio pool capacity

ated into RAID

the target stoppressing th

LEX requires t If a storage vtrue" either d

-zero data befo 1 rebuild is ads, but these voty. System voe pool. If the t

ndant leg of tho lose access

pter 3: Data M

ave an assocring an inter-

tion in loggin across the lin

very RAID 1 (

led to be maausing a full r

f recovery (wled on one leging volume)

will cause a fu link was down

ned storage y.

D 1 mirrors w

orage volumee write for ca

the user to s volume is thi during or afte

ore being condversely affectolumes must hlumes must no

thin storage he RAID 1, furth to the device,

Migrations

ciated -cluster

ng nk.

(DR1)

arked rebuild.

hen the eg and ).

ull n.

volumes

with

e by ases pecify nly

er

nected ted.

have ot

her ,

18

Chapter 4: Co


nsiderations


This

Bes

Wh

How

Job


s chapter pre

st Practices ..

at is transfer

w does transf

transfer spe

ons ractices Tech

esents the fo

....................

r size? .........

fer size affec

eed (as refere

nical Notes

Ch

llowing topic

....................

....................

ct performan

enced in the V

hapter 4

cs:

...................

...................

ce? .............

VPLEX GUI) .

4 Con

....................

....................

....................

....................

siderati

...................

...................

...................

...................

ions

......... 19

......... 19

......... 19

......... 20

W

Best Pra

What is t

How doe

ctices

Mig

BesseqTB/thin

Not

transfer s

TranwritblocMBper

es transfe

A la

gration and fr

Back-end

Migration

Rebuild-ty

Bandwidt

Up to 25 l

o

A local mi

A global m

Other mig

Applicatio

Host HBA

Amount o

Backend a

Array's wr

PCI port b

st case (no FEquential read/hour to do a ngs optimal..

te: Need to lo

size?

nsfer size is ttten on the tack size of dev. The size cansistent for fu

er size af

arger transfer

ront-end perf

storage layo

transfer-size

ype setting

h available o

ocal and glo

o 25 is a sh

gration occu

migration occ

grations will b

on write bloc

limits

f competing

array configu

rite limit to th

andwidth co

E or BE bottles and 4 GB/s producer/co.

ook at a note

the region ofarget. The devices) and asn be changed

uture migratio

ffect perfo

r size:

formance wil

out (physical

e setting

on the WAN C

bal migration

hared limit fo

urs within a c

curs between

be queued an

k size should

host traffic

uration (disks

he durable m

nfigured for

enecks) a VS2s sequential onsumer read

for over-exte

f a source eleefault value iss large as 32d during a mons.

formance

ll primarily de

disks, RAID t

COM link

ns can be in

or local and g

luster

n clusters (Me

nd started on

d match or be

s and RAID st

media/disk (n

backend and

2 Engine can writes. Say ad/write strea

ended arrays

ement that iss 128 KB. It c MB althougigration, will

e?

Cha

epend on:

type, numbe

progress at a

global combi

etro or Geo o

nce a rebuild

e a factor of 4

triping)

not the deferr

d frontend I/

n do upwardsat 3 GB/s thaam. Of course

s and migrati

s temporarily can be as sm

h not recomml take effect i

apter 4: Consid

r of connecti

any given tim

ined

only)

d slot opens u

4K

red write spe

O on VPLEX

s of 3 GB/s at would be oe, that assum

ion jobs

locked, readall as 4 KB (t

mend to exce mmediately,

derations

ions)

me

up

eed!)

over 5 mes all

d, and the eed 2 , and is

20

J

Chapter 4: Co


Job trans

nsiderations


sfer spee

Thetimtrantranimpthe accor in

By dtranperthe

It isapp


Results inmore perf

Is set for dperforman

A smaller

Results interms of t

Is set for d

ed (as refe

e transfer spee from the so

nsfer speed. nsfer speed rpact on host job is progreordingly. Youn progress. T

default, the Gnsfer speed pformance in GUI transfer

s advisable toplication activ

ons ractices Tech

a higher-performance imp

devices whernce

transfer size

the migratiohe response

devices wher

ferenced

eed determinource to the t The higher th

results in the I/O. Monitor essing too slou can changeThe change ta

GUI transfer s provides goo most environr speed and t

o avoid the uvity.

nical Notes

rformance mpact on FE I/O

re the prioriti

e:

on taking lon time to the h

re the priority

in the VP

es the maxim target. Whenhe speed, the mobility job the mobility owly, or I/O ie the transferakes effect im

speed is set td throughpunments. The

the transfer-s

use of higher

igration but O, especially

ies are data p

ger but will h host

y is FE storag

PLEX GUI)

mum numbe creating a me greater the

b taking longey job's progre is greatly impr speed of a jmmediately.

to lowest, whut while main following tabsize attribute

transfer spe

the tradeoff y for VPLEX M

protection or

have lower im

ge response t

)

r of bytes of mobility job, ye impact on her to comple

ess and its efpacted, adjus job while the

hich translattaining the b

ble shows the used in the

eds during ti

is that there Metro migratio

r migration

mpact on FE I

time

data transfer you can conthost I/O. A slote, but has a

ffect on host st the transfe

e job is in the

es to 128 KBbest front-ende mapping b CLI.

imes of heav

will be ons

/O in

rred at a trol this ower

a lower I/O. If er speed e queue

B. This d

between

vy

This

One

Append

s chapter pre

e-Time Data M

dix A E

esents the fo

Migrations ..

Example

llowing topic

....................

e One-Ti

cs:

...................

Cha

ime Data

....................

apter 4: Consid

a Migra

...................

derations

ation

......... 22

22

S

Chapter 4: Co


One-Tim

Start a One-TDevice or ExtData Migrati

nsiderations


e Data M

A onsoo

To s

1

2

3

4

5

6

Time tent ion


Migration

ne-time dataon as the “dm

start a one-ti

. Use the (includinvolume VPlexclivolumes/

virtual-l

. Identify

. Use the /cluster

. Identify

. Navigateto devicVPlexcli

For exte

VPlexcli

. Use the comman

dm mig

--tran

--from

--to d

o

o

o

o

ons ractices Tech

s

a migration mm start migrat

me device or

drill down cong extents) o level: i:/clusters/c/Symm1254_7B7

-volume: Symmlocal-device:

exten

the extent or

ll /clusters/cs/cluster/de

an unused e

e to the appre migration ci:/> cd data-

nt migrations

i:/> cd data-

“dm migrationd is:

gration st

nsfer-size

m source e

destinatio

o The --namand to m

o Use the oarea set asize mea

Range: 44K.

o Specify tin the glo

o Specify tthe globa

For exam

nical Notes

moves data betion” comma

r extent migra

ommand to dof a view, virt

cluster-1> dr7_1_vol

m1254_7B7_1_v: Symm1254_7Bnt: extent_Sy

storage-vo

r device used

cluster/storaevices comma

extent or devi

ropriate migr context: -migrations/d

s, navigate to

-migrations/e

on start” com

tart --na

e [40 KB-

extent or

on extent

me argumentanage (cance

optional --tra aside in cachns smaller sp

0 K - 128 M.

he --from devobal namesp

he --to deviceal namespac

ple:

etween the sand is used.

ation:

display the coual volume o

rill-down –o

vol (cluster-B7_1 (clusteymm1254_7B7_1olume: Symm1

d by the sour

age-elementsand to displa

ice as the de

ration contex

device-migrat

o extent migr

extent-migrat

mmand to sta

ame <name

128 MB]

r device

or devic

t is used to trel, commit, p

nsfer-size arhe to service pace availab

Default: 128

vice or extenace. Otherwi

e or extent be. Otherwise

specified sou

omponents o or device, do

virtual-

-1) er-1) 1 254_7B7

rce storage v

s/extents or lay available e

estination.

xt. For device

tions

ration contex

tions

art a migratio

of migrat

ce

rack the migr pause, resum

rgument to sp the migratio

ble for host I/

8 K. This mus

t by name if ise, specify a

y name if thae, specify a fu

urce and targ

of the sourcewn to the sto

olume.

ll extents or de

migrations,

xt:

on. The synta

tion>

ration’s progme) the migra

pecify the sizon. A bigger t/O.

st be a multip

that name isa full pathnam

at name is unull pathname

ets as

e, orage-

evices.

navigate

ax for the

gress, ation.

ze of the ransfer

ple of

s unique me.

nique in e.

V

Monitor a Migration’s Progress

VPLEX CLI Commands fData Migrati

Notedefa

Note

Use

VPle

Use

for ions

e: Setting too ault when perf

e: If host I/O a

e the ls comm

excli:/> ls d

Name Val--------from-clupercentasource dsource-estart-tistatus itarget dtarget-eto-clusttransfertype ful

e the followin

batch-mibatch-mibatch-mibatch-mibatch-mibatch-mibatch-mibatch-mibatch-mibatch-midm migradm migradm migradm migradm migradm migradm migra

VPlexcli:--name misize 12M

large a transfeformance imp

activity is high

mand to disp

data-migratio

lue -------- ----uster clusterage-done 10 device_012 exported falsime Fri May 2in progress device_012a exported falster cluster-2r-size 12M ll

ng command

igrate canceligrate check-igrate cleanigrate commitigrate createigrate pauseigrate removeigrate resumeigrate startigrate summaration cancelation clean ation commitation pause ation removeation resumeation start

:/data-migratigrate_012 –f

er size may relications are f

h, setting a larg

lay the migra

ons/device-mi

-------------r-1

se 28 13:32:23 M

se 2

s to create an

l -plan

t e-plan

e e

ry

tions/device-from device_0

sult in data unfully understoo

ge transfer siz

ation’s status

migrations/ m

-------------

MDT 2010

nd manage y

Cha

-migrations> 012 --to devi

navailability. Ood.

ze may impact

s.

migrate_012

-

your migratio

apter 4: Consid

dm migrationice_012a --tr

Only vary from

t host I/O.

ons.

derations

n start ransfer-

m the

24

Chapter 4: Co


Example DatMigration Operation

nsiderations


For resiis trdat

Theman

Thisbat

1

2

ta


this exampleide on the Soransparent toastores.

e actual data nner:

Convert th

Add the ta

Synchroni

When fully

Remove th

s procedure mch migration

. On the Videntifiesession

A sessiohoweverplan fileused to

cD

The follo

View thesession the SMS

v

The follo

. Check thcomman

ons ractices Tech

e, we will initource Array-1o the ESXi se

movement fr

he source vol

arget device

ize the mirro

y synchroniz

he source de

may be perfo procedure t

VPLEX consoles the source is created, it

on can be crer, for this exa

e automatical specify the scd /clusters/Datastore* -t

owing is an e

e file created details and i

S console, exvi /tmp/batch

owing is an e

he plan and tnd validates

nical Notes

tiate the mig1 to the Targe

rvers and the

rom source t

lume from a

as a mirror

r

ed, promote

evice to conve

ormed manuahat automate

le, create a be and target dt is assigned

eated manuaample we willly. Note in thsource and ta/cluster-2/det Target_Dev*

example of th

by the abov is used by suxecute the folh_mig_plan

example of th

then start the the migration

ration of the et devices one virtual mac

o target is pe

RAID 0 to a R

the target de

ert it back to

ally; howevees the steps.

batch migrati devices and o

a session na

lly by creatinll use the follhis example, arget devicesdevices batchv* /tmp/batch

he command

ve command.ubsequent collowing comm

he file that wa

e migration sn plan. Starti

data on the n Array-2. Thechines that re

erformed in t

RAID 1 config

evice to be th

a RAID 0 con

r, the best pr.

on plan. A pl other attributame.

ng and editinlowing comm the wildcard

s. h-migrate creh_mig_plan

dialog.

. This file defommands. Inmand.

as created.

session. The ing the migra

source device migration oeside on the

the following

guration

he primary co

nfiguration

ractice is to u

lan is a file thtes. When th

g the plan filmand to creatd character “*

eate-plan –f

fines the mign a root windo

check-plan ation will con

ces that peration

g

opy

use the

hat e

le; te the *” was

gration ow on

nvert the

3

source dthe sync

b

b

The follo

. Verify thstatus o

c

l

The folloprogress

Display convertsmirror. UNote thethe statuis norma

c

l

The follo

Determito displa

c

l

device to a RAchronization batch-migrate

batch-migrate

owing is an e

he status of thf all active dcd /data-migr

ll

owing is an es and 7 perce

the device cos the source Use the followe source devius of the deval until the mcd clusters/c

ll

owing is an e

ne how long ay details ab

cd /cluster/c

ll

AID 1 device, process. e check-plan

e start /tmp/

example of th

he migrationevice migratirations/devic

example of thent complete

onfiguration.device to a Rwing commaices are renavice shows a

mirror is fully scluster-2/dev

example of th

the migratioout the sourc

cluster-2/dev

, add the targ

/tmp/batch_

/batch_mig_p

he command

. The followiion sessionsce-migration

he dialog. Hee.

. You will seeRAID 1 confignd to view th

amed MIGRAT degraded st synchronizedvices

he command

on will take. Ece device tha

vices/MIGRAT

Cha

get device as

_mig_plan

plan

dialog.

ng commands. ns

re we see the

e that the migguration and he configuratTE_<Session ate during syd.

dialog.

Execute the fat was renam

TE_BR0_0

apter 4: Consid

s a mirror, an

d will show th

e migration i

gration proce adds the targtion of the de name>. Also,ynchronizatio

following commed MIGRATE

derations

nd start

he

s in

ess get as a evice. , note on. This

mmand E_BR0_0.

26

Chapter 4: Co


nsiderations


5


4. Vethecd

ll

The follocomplet

Display OK, indi

c

l

The follocomplet

. Once thecommitt

b

ons ractices Tech

erify that the e Percentage/data-migrat

owing is an ete.

details aboucating that th

cd /clusters/

ll

owing is an eted synchron

e synchronizted. The follobatch-migrate

nical Notes

migration haeDone will shtions/device-

example of w

ut the operatihe RAID 1 mi

/cluster-2/de

example of wization.

zation compleowing commae commit /tmp

as completedhow 100. Exe-migrations

hat you will s

ional state ofirrors are syn

devices

hat you wou

etes, the migand will commp/batch_mig

d. When the mecute the follo

see when the

f the device. nchronized.

ld see when

gration sessiomit the migra

migration comowing comm

e synchroniz

It should now

the mirrors h

on can be ation.

mpletes and.

ation is

w show

have

6

After comtarget deESX clus

Also not

c

l

. The nextdevice dto an unto assumup the m

b

In the foname ofAlso not

Verify th

c

l

mmitting, boevice being aster.

te the migrat

cd /data-migr

ll

t step of the down to the snclaimed statme the namemigration. batch-migrate

ollowing examf the source dte that the so

he source dev

cd /clusters/

ll

oth the sourceassociated w

ion session w

rations/devic

batch migratstorage volumte. Using the

e of the sourc

e clean –-ren

mple note thadevice and itource device

vice is now “

/cluster-2/st

e and target with the virtua

will show as

ce-migration

tion is the cleme and the s rename opti

ce volume. Th

name-targets

at the migratt is now asso was removed

unclaimed”.

torage-eleme

Cha

devices are nal volume tha

committed.

ns

ean. This disource storagion will causehe following

s /tmp/batch_

tion target deciated with td.

ents/storage-

apter 4: Consid

now visible wat is presente

mantles the ge device is ce the target vcommand wi

_mig

evice assume the virtual de

-volumes

derations

with the ed to the

source changed volume ill clean

ed the evice.

28

Chapter 4: Co


nsiderations


7


. The finamigratioinformat

b

The folloinformat

Note: Tryof an incmigrationhours.

ons ractices Tech

l step of the on session frotion about thbatch-migrate

owing is an etion is now g

y to schedule dreased worklons during hou

nical Notes

batch migratom the VPLEXhe completede remove /tmp

example of thgone.

data migrationoad on the bacrs of productio

tion is to remX. The followd migration smp/batch_mig

he command

ns during off-pck end. If needon and then re

move all inforwing commansession from

dialog. Note

peak-hours to ded, you may esume those j

rmation abound will remov the VPLEX.

e that the ses

minimize the stop (or pause obs during off

ut the ve all

ssion

impact e) ff-peak-

This

Bat

s chapter pre

tch Migration

Appen

esents the fo

ns ................

ndix B

llowing topic

....................

Examp

cs:

...................

Cha

ple Batch

....................

apter 4: Consid

h Migra

...................

derations

ation

......... 30

30

Chapter 4: Co


Batch Mi

Batch Plan Prerequisite

nsiderations


igrations

BatMig

A si

Notemay

Use

The

The

Cre

Thesou

batctarg

s


s

ch migrationgration plan f

ingle batch m

e: Note: Migray impact host

e batch migra

Retire sto

Migrate de

ere are two ad

Create a b

Test the b

e following pr

The sourcdevices an

Extents mconfigured

The struct

For extentcluster.

ate a Batch M

e batch-migraurces and targ

ch-migrate crgets --force

--file - Speglobal nam

--sources list. Each

For extent

--targets - list.

For extentextents.

--force - If be overwr

ons ractices Tech

ns are run as files are creat

migration pla

ations consum I/O.

ations to:

rage arrays (o

evices to a d

dditional ste

batch migrati

batch migratio

rerequisites a

e and targetsnd extents ar

ust be claimd (device mig

ture of the ta

t migrations,

Migration Pla

ate create-plagets. The syn

reate-plan --

ecify the migrmespace. Ot

- Pathname( element may

t migrations,

Pathname(s

t migrations,

a plan file written.

nical Notes

batch jobs frted using the

n can be eith

me cache resou

off-lease arra

ifferent class

ps to prepare

on plan file

on plan file

are required

s are both dere not suppo

ed (extent mgrations) on

rget is the sa

both source

an

an commandntax for the c

-file migrati

ration-filenamherwise, spe

(s) of the souy contain wild

source exten

s) of the targe

target exten

with the same

rom reusablee create-plan

her for device

urces. Running

ays) and brin

s of storage a

e for a batch

for batch mig

evices and exorted.

migrations) or the target ar

ame as the st

and target e

d creates a mommand is:

ion-filename

me filename ecify a full pa

urce extents odcards.

nts must be i

et extents or

ts must be in

e name alread

e batch migran command.

es or extents

g multiple mig

ng new ones

array

migration:

grations:

xtents. Migra

r local deviceray.

tructure of th

extents must

igration plan

e --sources s

only if that nathname.

or devices as

in the same c

devices as a

n the same c

dy exists, for

ation plan fil

, but not bot

grations concu

online

ations betwee

es must be

he source.

be in the sam

n using the s

sources --tar

name is uniq

s a comma-se

cluster.

a comma-sep

luster as the

rces the old p

es.

th.

urrently

en

me

pecified

rgets

ue in the

eparated

parated

source

plan to

Check a BatcMigration Pl

In tmig

VP/c/cExExCrWran

In tmig

VP1/

Themig

If thplan

Oncmod

ch lan

he following gration name

Migrate tw

Overwrite Plexcli:/> baclusters/clusclusters/clusxtents matchixtents matchireating file rote file /vand run this c

he following gration to mig

Plexcli:/> ba/devices/* --

e batch-migragration plan f

Block-size

Capacity o

Device mi

o

o

Extent mig

o

o

he migration n check will f

VPlexcliCheckingTarget dTarget dPlan-che

ce the batch dify until the

VPlexcliCheckingPlan-che

example, thed ‘MigDev-te

wo devices at

an existing patch-migrate ster-1/devicester-2/deviceing source paing target pa/var/log/VPl

ar/log/VPlex/command in th

example, thegrate all devi

atch-migrate -targets /clu

ate check-pla for the follow

e of source a

of target exte

grations:

o Target de

o Source d

grations:

o Target ex

o Source ex

plan contain fail. For exam

i:/> batch-mig migration pdevice '/clusdevice '/cluseck failed, 2

migration file batch migra

i:/> batch-mig migration peck passed.

e batch--migest.txt’ to:

t cluster-1 to

plan with thecreate-plan

es/base0,/cles/dev1723_6attern: baseattern: dev1lex/cli/MigD/cli/MigDev-he check-pla

e batch-migrces at cluste

create-planusters/clust

an --file file-nwing:

nd target ext

ent is equal o

evice has no

evice has vo

xtent is claim

xtent is in us

ns errors, a demple:

igrate check-plan file /vasters/clustersters/cluster2 problems.

e has been cation plan pa

igrate check-plan file /te

grate create-p

o two devices

e same namen --file MigDusters/clust18, /cluster

e0, base1 723_61C, dev

Dev-test.txt test.txt. Pl

an phase afte

rate create-pler-1 to cluste

n migrate.txtter-2/devices

name comma

tents is equa

or bigger than

volumes on

lumes on it

ed and ready

se

escription of

-plan --file ar/log/VPlex/r-2/devices/dr-2/devices/d

corrected, repsses the plan

-plan --file emp/migration

Cha

plan comman

s at cluster-2

e: Dev-test.txt ter-1/devicesrs/cluster-2/

v1723_618 as migration

lease review erward.

lan commanr-2:

t --sources /s/*

and checks th

al (4 K bytes)

n the source

it

y for use

f the errors is

MigDev-test./cli/MigDev-tdev1723_61C' dev1723_618'

peat the procn check. For

migrate.txt n_plans/migra

apter 4: Consid

nd creates a b

--sources s/base1 --tar/devices/dev1

n plan file.and edit thi

d creates a b

/clusters/clu

he specified

extent's cap

s displayed, a

.txt test.txt. has a volumehas a volume

cess of check example:

ate.txt.

derations

batch

rgets 1723_61C

is file,

batch

uster-

batch

acity

and the

e. e.

k and

32

S

Chapter 4: Co


Modify a batmigration fil

Start a BatchMigration

Pause/ResumBatch Migrat

Cancel a BatMigration

Monitor a BaMigration’s Progress

nsiderations


To mcreaove

Fac

Usestar

Actiresu

Paupea

Res

Usemig

Usepau

Canthe

Usemig

Notecom

Useof t

tch le

h

me a tion

tch

atch


modify a batcate-plan com

erwrite the old

tors to consi

For VPLEXtransfer si

The regionfrom that I/O.

When a retransfer-s

e the batch-mrt the specifi

VPlexcli

S

ive batch migumed.

use an activeak traffic.

sume the bat

e the batch-mgration. For ex

VPlexclimigrate.

e the batch-mused migratio

VPlexclimigrate.

ncel an active start of the m

e the batch-mgration. For ex

VPlexclimigrate.

e: In order to rmmand must b

e the batch-mhe specified

ons ractices Tech

ch migration mmand, spec

d plan with t

der when sp

X Metro configize lower so t

n specified b region is hel

egion of dataize mean mo

migrate start -ed batch mig

i:/> batch-mi

Started 4 of

grations (a m

batch migra

ch migration

migrate pausexample:

i:/data-migratxt

migrate resumon. For exam

i:/data-migratxt

e batch migra migration.

migrate cancexample:

i:/data-migratxt

re-run a cancebe used to rem

migrate summ batch migra

nical Notes

file, do one ify the same he new one.

ecifying the t

gurations wit the migration

y transfer-sizd. Set a sma

is transferreore broadcast

--transfer-sizgration:

igrate start

4 migrations

migration that

ation to releas

during perio

e --file filenam

ations/device

me --file filenple:

ations/device

ation to retur

el --file filena

ations/device

eled migration move the record

mary filenametion:

of the follow filename, an

transfer-size

th narrow intn does not im

ze is locked daller transfer-

ed, a broadcats, slowing th

ze [40K-128M

--file migra

s.

t has been st

se bandwidt

ods of low I/O

me comman

e-migrations>

ame comma

e-migrations>

rn the source

ame comman

e-migrations>

plan, the batcds of the migr

e --verbose c

wing: Use the nd use the --f

:

ter-cluster bampact inter-c

during migrasize during p

ast is sent to he migration

M] --file filena

ate.txt --tra

tarted) can b

th for host I/O

O.

d to pause th

> batch-migra

nd to resume

> batch-migra

e volumes to

nd to cancel t

> batch-migra

ch-migrate remration.

command to

batch-migraforce option t

andwidth, setcluster I/O.

ation. Host I/O periods of hig

the system. .

ame comman

ansfer-size 2

be paused an

O during peri

he specified

ate pause --f

e the specifie

ate resume --

their state p

the specified

ate cancel --

move filename

monitor the

ate to

t the

O to or gh host

Smaller

nd to

2M

nd

iods of

active

file

ed

-file

rior to

d

-file

e

progress

V

View a BatchMigration’s S

For

Usespe

VPle

h Status

VPlexcli--verbos

example:

VPlexclimigrate.

e the batch-mecified batch

excli:/> batc

Processe

committecompletein-progrpaused: error: 0cancelleno-recor

i:/data-migrase

i:/data-migratxt --verbos

migrate summ migration. Fo

ch-migrate su

ed 10 migrati

ed: 0 e: 10 ress: 0 0

0 ed: 0 rd: 0

ations/device

ations/devicese

mary filenameor example:

ummary migrat

ions from bat

e-migrations>

e-migrations>

e command t

te.txt

tch migration

Cha

> batch-migra

> batch-migra

to display th

n BR0:

apter 4: Consid

ate summary f

ate summary -

e status of th

derations

filename

--file

he

34

Chapter 4: Co


nsiderations


This

VPL


App

s chapter pre

LEX Distribut

ons ractices Tech

pendix C

esents the fo

ed Device M

nical Notes

C Exam

llowing topic

igrations .....

mple Dis

cs:

...................

stributed

....................

d Migra

...................

ation

......... 35

V

VPLEX Di

istribute

Recandcomyouconsitsthe view

Distlevefollodevsimtopprothe this

1. T

Figushoacti

d Device

capping, “disd are thereformponents muu may know antains one legs on top of th cache coherw on both clu

tributed deviel instead theowing sectio

vice. The sammultaneously

ology knowncess, as the distributed d

s example an

Test Environm

ure 5 is a screown as a vmfsive host side

Migratio

stributed devre used only ust be createa “distributedg (leg-2 is higat. The virtuarency layer. Tusters (1 & 2)

ice memberse migration mns walk the u

me methodolo or not. Whet

n as “cross co migration pr device. As win ESX Datasto

ment

eenshot of ths5 “datastor I/O and is ex

ons

vices” are con in a VPLEX Md from storagd device” hasghlighted) ofal volume is aThe virtual vo), though not

s (referred to must occur o user throughogy can be apther the VPLEonnect” is NOrocess occursill be shown,ore) is online

he Virtual Cere” assigned xported via a

nfigured by uMetro or Geo ge in both clus the below cf the distribu always the toolume is expot required.

as “legs”) cane level belo

h the migratiopplied to eith

EX storage is OT a factor ins dynamically, during the m

e and suppor

nter. The tes to a VM. So t

a VPLEX stora

Cha

using storage system. A disusters (e.g. “

composition.ted device, aop layer and orted to host

annot be migow, at the “exon of one legher side of th provisioned

n the successy below the dmigration prorting active V

t VPLEX distr the VPLEX Diage view on b

apter 4: Consid

e from both cstributed dev

“remote mirro. Note each cand a virtual basically reps via the stor

grated at the xtent” layer.

g of a distribuhe distributed using the zos/failure of th devices repreocess the volM’s.

ributed devicistributed De both ESX clu

derations

clusters, vice's or”). As

cluster volume presents rage

device The uted d device,

oning he esenting lume (in

ce is evice has sters.

36

Chapter 4: Co


nsiderations


Figu

2. V

For sho

Note“VN

Figu


ure 5. Test E

VPLEX Enviro

this test the own here is v

e: the same “dNX2511_ALS_V

ure 6. CLU-1

ons ractices Tech

Environment

nment

VPLEX Metroalid for versi

distributed” dVMFSTEST_LU

1 Storage View

nical Notes

o cluster is aton 5.1 and 5

evice is exporN71_1_vol”.

w ESX Cluster

t version 5.25.0.1 as well.

rted on both c

, though the .

lusters

same metho

odology

Distributed DDetails

Figu

NoteNote

Figu

Device

ure 7. CLU-2

e the “leg-1” se the “leg-2” s

ure 8. Distri

2 Storage View

source device source device

buted Device

w for ESX Clus

is: device_VN is: device_VN

Map

ster

NX2587_SOURNX2587_SOUR

Cha

RCE_LUN2_120RCE_LUN2_1_v

apter 4: Consid

014Jan06_10vol

derations

2917

38

Chapter 4: Co


Extent Detai

nsiderations


CLU

VPle/clu

Name

----

appl

bloc

bloc

bloc

capa

desc

heal

heal

io-s

itls

loca

name

oper

stor

stor

syst

unde

use

used

vend

ls


U-1

excli:/clusteusters/cluste

e Value

-------------

lication-cons

ck-count

ck-offset

ck-size

acity

cription

lth-indicatio

lth-state

status

s

ality

e

rational-stat

rage-volume

rage-volumety

tem-id

erlying-stora

d-by

dor-specific-

ons ractices Tech

ers/cluster-1er-1/storage-

-------------

sistent

ons

tus

ype

age-block-siz

-name

nical Notes

1/storage-ele-elements/ext

-- ----------

false

4456448

0

4K

17G

-

[]

ok

alive

0x50001442

0x50001442

0x50001442

0x50001442

0x50001442

0x50001442

0x50001442

0x50001442

0x50001442

0x50001442

(16total)

-

extent_VNX

ok

VNX2587_AL

normal

SLICE:b007

ze 512

used

[device_VN

DGC

ements/extentents/extent

------------

24007d930/0x

24007d930/0x

24007d920/0x

24007d920/0x

24007d320/0x

24007d320/0x

24007d330/0x

24007d330/0x

25007d320/0x

25007d330/0x

X2587_ALS_LU

ALS_LUN2

7d3d887397b6

VNX2587_SOURC

nts> ls extent_VNX2587_ALS

-------------

x500601683ce0

x500601613ce0

x500601693ce0

x500601603ce0

x500601603ce0

x500601693ce0

x500601613ce0

x500601683ce0

x500601693ce0

x500601613ce0

UN2_1

6c

CE_LUN2_1]

nt_VNX2587_ALS_LUN2_1:

-------------

01490/3,

01490/3,

01490/3,

01490/3,

01490/3,

01490/3,

01490/3,

01490/3,

01490/3,

01490/3,

LS_LUN2_1

----

CLU

VPle/clu

Name

----

appl

bloc

bloc

bloc

capa

desc

heal

heal

io-s

itls

loca

name

oper

stor

stor

syst

unde

use

used

vend

U-2

excli:/clusters/custers/cluste

e Value

-------------

lication-cons

ck-count

ck-offset

ck-size

acity

cription

lth-indicatio

lth-state

status

s

ality

e

rational-stat

rage-volume

rage-volumety

tem-id

erlying-stora

d-by

dor-specific-

cluster-2/storager-2/storage-

-------------

sistent

ons

tus

ype

age-block-siz

-name

ge-elements/ex-elements/ext

-- ----------

false

4456448

0

4K

17G

-

[]

ok

alive

0x50001442

0x50001442

0x50001442

0x50001442

0x50001442

0x50001442

0x50001442

0x50001442

0x50001442

0x50001442

(12 total)

-

extent_VNX

ok

VNX2511_AL

normal

SLICE:b012

ze 512

used

[device_VN

DGC

xtents> ls extentents/extent

------------

240128820/0x

240128820/0x

240128830/0x

240128830/0x

2502d7e20/0x

2502d7e30/0x

2502d7e20/0x

2502d7e30/0x

2402d7e20/0x

2402d7e20/0x

)

X2511_ALS_LU

ALS_LUN72

2883c92189e4

VNX2587_SOURC

Cha

nt_VNX2511_At_VNX2511_ALS

-------------

x5006016c46e0

x5006016546e0

x5006016446e0

x5006016d46e0

x5006016c46e0

x5006016d46e0

x5006016546e0

x5006016446e0

x5006016c46e0

x5006016546e0

UN72_1

8

CE_LUN2_1]

apter 4: Consid

ALS_LUN72_1S_LUN72_1:

-------------

0655a/11,

0655a/11,

0655a/11,

0655a/11,

0655a/11,

0655a/11,

0655a/11,

0655a/11,

0655a/11,

0655a/11,

derations

----

40

Chapter 4: Co


Extent Migra

GUI Method

nsiderations


ExteJob

Theexte

1. B

2. CExte

3. In

ation


ent migrations you can:

Non-disru

Non-disru

Free up th

e following prents.

Browse to the

Choose “Exteent Mobility J

n the “Select

ons ractices Tech

ns are also re

uptively move

uptively data

he original ex

rocess illustr

e “Mobility C

ent Mobility Jo Jobs”

t Cluster” vie

nical Notes

eferred to as

e data betwe

mobility betw

xtent for repu

rates VPLEX e

entral” view.

obs”, “Cluste

ew, choose C

extent mobi

en source an

ween source

urposing else

extent mobili

. Select move

er-1”, and “A

luster-1 as th

lity jobs. Usi

nd target exte

e and target a

ewhere

ity using dist

e within (or a

Any Status” o

he source ext

ng Extent Mo

ents

arrays

tributed devi

across) Cluste

options. Then

tent owner.

obility

ce

er(s)

n “Create

4. S

5. F

Skip the “Sel

From the “Ava

ect Storage V

ailable Exten

Volume” view

nts” view, clic

w

ck on the des

Cha

sired source

apter 4: Consid

“extents”

derations

42

Chapter 4: Co


nsiderations


6. Inas s

8. InTran


n the “Create shown by usi

n the “Setupnsfer Speed.

ons ractices Tech

e Source-Targing the “Auto

-Up Job & Sta (both option

nical Notes

get Mappingso-Generate M

art Jobs” viewnal)

s” view, chooMappings” bu

w, name you

ose the sourcutton.

r migration jo

ce and target

obs and set t

t extent

the

9. F

10.

11.

From the “Vie

From the “M

Monitor the

ew Results” p

Monitoring” ta

extent mobi

page you will

ab, click the

lity jobs unti

l see the jobs

“Add Rebuild

l completed.

Cha

s have been s

d Status” bu

.

apter 4: Consid

started and r

tton.

derations

running.

44

Chapter 4: Co


nsiderations


10. chamig

11. donleft

12. Thedur


After the miganges to movgration has b

The last stepne by highligh of the screen

The original e migration isring the comp

ons ractices Tech

grations haveve forward or een committ

p is to clean hting the mon.

source extens complete anplete process

nical Notes

e completed “cancel” to rted it cannot

up the migrability jobs an

nts have nownd the produs.

, you have th roll back any be cancelled

ation after it hnd clicking th

w been replacuction VM wa

he opportunity changes mad.

has been comhe “remove”

ced with the as never take

ty to “commiade. Once th

mmitted. This button at the

new target een out of prod

it” your e

s is e bottom

extents. duction

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