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ARUP_JYOTI_THAK's avatar
ARUP_JYOTI_THAK
Level 4
10 years ago

VXVM Strip volume extension

Hello,

I have the following issue.

 

sunstation1:/root# vxassist -g DG-DB001 maxsize
Maximum volume size: 326191104 (159273Mb)------------------------->It is showing that volume can be increased up to 159273Mb
sunstation1:/root#
sunstation1:/root#
sunstation1:/root# /etc/vx/bin/vxresize -g DG-DB001 VOL-DB001-data1 +50g
VxVM vxassist ERROR V-5-1-436 Cannot allocate space to grow volume to 1498001965 blocks
VxVM vxresize ERROR V-5-1-4703 Problem running vxassist command for volume VOL-DB001-data1, in diskgroup DG-DB001

 

Is it due to any internal restriction of the Volume manager.

 

 

regards

Arup

business continuity
Solaris
Storage Foundation
  • mikebounds's avatar
    mikebounds
    10 years ago

    Your volume is an 8-way stripe (STRIPE 8/512) so you will need 8 LUNs to increase the size of the volume.

    If you don't have 8 LUNs, then you will need to with do a "vxassist relayout" which just needs a relatively small tmp space to relayout, but takes a while to relayout and effects peformance of volume or you can mirror to a new LUN as concat and then remove old mirror, but this requires you temporarlly assign double the storage, but has less impact on performance - see https://www-secure.symantec.com/connect/forums/how-expand-dg-vgbackup-and-after-filesystem-prod01p

    Mike

8 Replies

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  • Gaurav_S's avatar
    Gaurav_S
    Moderator
    10 years ago

    Hello,

    What is the structure of the volume ? can you paste the output of vxprint ?

    It is quite possible that striped volume is getting spread across multiple disks & the available space is all available from one or multiple disk however not enough to equally cut the stripes to grow the volume ..

    so if the volume has 3 stripes, you should have spaces available in 3 different disks in order for resize to succeed ...

    Alternatively, you can try below technote

    https://support.symantec.com/en_US/article.TECH136828.html

     

    G

  • Haniwa's avatar
    Haniwa
    Level 4
    10 years ago

    Arup,

    'vxassist -g xxx maxsize' will list free blocks in the disk group (without regard to volume geometry).

    Instead, use 'vxassist -g xxx maxgrow <volume_name>' to list the amount that a specific volume can grow, taking into account the volume's geometry (concat vs stripe vs mirror).

    You should do a 'vxprint -ht' before and after to see how the disks are mapped to the stripes. It should be a unique disk for each stripe in the volume.

    Ken W

  • ARUP_JYOTI_THAK's avatar
    ARUP_JYOTI_THAK
    Level 4
    10 years ago

    Hello Gaurav

    Please refere the below output--

    sunstation1:/root# vxprint -htqg DG-DB001 VOL-DB001-data1
    v  VOL-DB001-data1 -       ENABLED  ACTIVE   1414115885 SELECT  VOL-DB001-data1-01 fsgen
    pl VOL-DB001-data1-01 VOL-DB001-data1 ENABLED ACTIVE 1414164480 STRIPE 8/512 RW
    sd DSK-DG-DB001-110d-01 VOL-DB001-data1-01 DSK-DG-DB001-110d 3328 170826240 0/0 xp24k1_110d ENA
    sd DSK-DG-DB001-1369-02 VOL-DB001-data1-01 DSK-DG-DB001-1369 2107648 3317760 0/170826240 xp24k1_1369 ENA
    sd DSK-DG-DB001-1369-04 VOL-DB001-data1-01 DSK-DG-DB001-1369 110288128 2626560 0/174144000 xp24k1_1369 ENA
    sd DSK-DG-DB001-110f-01 VOL-DB001-data1-01 DSK-DG-DB001-110f 3328 170826240 1/0 xp24k1_110f ENA
    sd DSK-DG-DB001-136B-02 VOL-DB001-data1-01 DSK-DG-DB001-136B 20969728 5944320 1/170826240 xp24k1_136b ENA
    sd DSK-DG-DB001-1100-01 VOL-DB001-data1-01 DSK-DG-DB001-1100 3328 170826240 2/0 xp24k1_1100 ENA
    sd DSK-DG-DB001-1112-03 VOL-DB001-data1-01 DSK-DG-DB001-1112 21292288 5944320 2/170826240 xp24k1_1112 ENA
    sd DSK-DG-DB001-1101-01 VOL-DB001-data1-01 DSK-DG-DB001-1101 3328 170826240 3/0 xp24k1_1101 ENA
    sd DSK-DG-DB001-110e-02 VOL-DB001-data1-01 DSK-DG-DB001-110e 49024768 5944320 3/170826240 xp24k1_110e ENA
    sd DSK-DG-DB001-1102-01 VOL-DB001-data1-01 DSK-DG-DB001-1102 3328 170826240 4/0 xp24k1_1102 ENA
    sd DSK-DG-DB001-110c-02 VOL-DB001-data1-01 DSK-DG-DB001-110c 83891968 5944320 4/170826240 xp24k1_110c ENA
    sd DSK-DG-DB001-1103-01 VOL-DB001-data1-01 DSK-DG-DB001-1103 3328 170826240 5/0 xp24k1_1103 ENA
    sd DSK-DG-DB001-1368-02 VOL-DB001-data1-01 DSK-DG-DB001-1368 135232768 5944320 5/170826240 xp24k1_1368 ENA
    sd DSK-DG-DB001-1104-01 VOL-DB001-data1-01 DSK-DG-DB001-1104 3328 170826240 6/0 xp24k1_1104 ENA
    sd DSK-DG-DB001-110b-02 VOL-DB001-data1-01 DSK-DG-DB001-110b 164723968 5944320 6/170826240 xp24k1_110b ENA
    sd DSK-DG-DB001-1105-01 VOL-DB001-data1-01 DSK-DG-DB001-1105 3328 170826240 7/0 xp24k1_1105 ENA
    sd DSK-DG-DB001-1111-03 VOL-DB001-data1-01 DSK-DG-DB001-1111 165430528 5399040 7/170826240 xp24k1_1111 ENA
    sd DSK-DG-DB001-1640-01 VOL-DB001-data1-01 DSK-DG-DB001-1640 3328 545280 7/176225280 xp24k1_1640 ENA

     

     

  • ARUP_JYOTI_THAK's avatar
    ARUP_JYOTI_THAK
    Level 4
    10 years ago

    Hello Haniwa

     

    Thank you for your reply. Yes the volumes are stipe one.Out put is already posted in reply to Gaurav.

  • mikebounds's avatar
    mikebounds
    Level 6
    10 years ago

    Your volume is an 8-way stripe (STRIPE 8/512) so you will need 8 LUNs to increase the size of the volume.

    If you don't have 8 LUNs, then you will need to with do a "vxassist relayout" which just needs a relatively small tmp space to relayout, but takes a while to relayout and effects peformance of volume or you can mirror to a new LUN as concat and then remove old mirror, but this requires you temporarlly assign double the storage, but has less impact on performance - see https://www-secure.symantec.com/connect/forums/how-expand-dg-vgbackup-and-after-filesystem-prod01p

    Mike

  • starflyfly's avatar
    starflyfly
    Level 6
    10 years ago

    Hi, 

      You should try:

      vxassist -g DG-DB001 maxsize layout=stripe ncol=8

     

    same layout as your current volume.

     

  • TonyGriffiths's avatar
    TonyGriffiths
    Level 6
    10 years ago

    As others have mentioned, the error is most likely due to the fact that the grow operation is requiring free space from 8 devices as the volume is of a striped layout.

     

    cheers

    tony

  • ARUP_JYOTI_THAK's avatar
    ARUP_JYOTI_THAK
    Level 4
    10 years ago

    Thank you all,all of you pointining to the correct root cause.The same has been communicated to the end customer also.Kudos to all!!!!