SHIFT

--- Sjoerd Hooft's InFormation Technology ---

User Tools

Site Tools


Sidebar

Sponsor:

Would you like to sponsor this site?
Or buy me a beer?:


Recently Changed Pages:

View All Pages
View All Q Pages


View All Tags


Sign up for Q to post comments.





WIKI Disclaimer: As with most other things on the Internet, the content on this wiki is not supported. It was contributed by me and is published “as is”. It has worked for me, and might work for you.
Also note that any view or statement expressed anywhere on this site are strictly mine and not the opinions or views of my employer.


Terms And Conditions for Q users


Pages with comments

PageDateDiscussionTags
2019/06/22 10:36 1 Comment
2019/03/15 16:02 1 Comment
2019/03/15 16:02 1 Comment
2019/03/15 16:02 3 Comments
2017/04/20 15:28 1 Comment
2017/04/20 15:23 1 Comment
2017/04/19 14:44 1 Comment
2017/04/17 20:10 1 Comment
2017/04/17 20:07 1 Comment
2017/04/17 19:58 1 Comment
2017/04/17 19:52 1 Comment

View All Comments

netappaggrexpansion

NetApp Aggregate Expansion

When you're running ontap 8.1 you can finally create or upgrade your aggregates to 64 bits. There is only one supported way to upgrade your aggregate to 64 bits and that is by adding enough disks to make the amount of space exceed 16 TB. This is very well explained in this TR from NetApp. This article is just me going through the article and doing some extra steps afterwards, to maximize performance for the newly created free space.

Check Configuration

These are my aggregates, I'm going to upgrade aggr0:

filer01> aggr status
           Aggr State           Status            Options
          aggr0 online          raid_dp, aggr     root
                                redirect
                                32-bit
     aggr1_SATA online          raid_dp, aggr     nosnap=on
                                32-bit
     aggr2_SATA online          raid_dp, aggr     raidsize=16
                                32-bit

These are my raid groups, (and why is that important? Read this article):

Note that I removed the info regarding aggr1 and aggr2 since I'm not going to do anything with these aggregates.
filer01> sysconfig -r
Aggregate aggr0 (online, raid_dp, redirect) (block checksums)
  Plex /aggr0/plex0 (online, normal, active, pool0)
    RAID group /aggr0/plex0/rg0 (normal, block checksums)

      RAID Disk Device  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------  ------------- ---- ---- ---- ----- --------------    --------------
      dparity   0a.16   0a    1   0   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      parity    0a.32   0a    2   0   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.16   0c    1   0   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.32   0c    2   0   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.17   0a    1   1   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.17   0c    1   1   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.33   0a    2   1   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.33   0c    2   1   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.18   0a    1   2   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.18   0c    1   2   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.34   0a    2   2   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.34   0c    2   2   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.27   0a    1   11  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.19   0c    1   3   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.35   0a    2   3   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.35   0c    2   3   FC:A   0  FCAL 15000 272000/557056000  274845/562884296

    RAID group /aggr0/plex0/rg1 (normal, block checksums)

      RAID Disk Device  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------  ------------- ---- ---- ---- ----- --------------    --------------
      dparity   0c.20   0c    1   4   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      parity    0a.36   0a    2   4   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.36   0c    2   4   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.20   0a    1   4   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.21   0c    1   5   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.37   0a    2   5   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.37   0c    2   5   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.21   0a    1   5   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.22   0c    1   6   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.38   0a    2   6   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.38   0c    2   6   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.22   0a    1   6   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.23   0c    1   7   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.39   0a    2   7   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.39   0c    2   7   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.23   0a    1   7   FC:A   0  FCAL 15000 272000/557056000  274845/562884296

    RAID group /aggr0/plex0/rg2 (normal, block checksums)

      RAID Disk Device  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------  ------------- ---- ---- ---- ----- --------------    --------------
      dparity   0a.40   0a    2   8   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      parity    0c.24   0c    1   8   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.24   0a    1   8   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.40   0c    2   8   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.41   0a    2   9   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.25   0c    1   9   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.25   0a    1   9   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.41   0c    2   9   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.44   0a    2   12  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.26   0c    1   10  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.26   0a    1   10  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.42   0c    2   10  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.43   0a    2   11  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.27   0c    1   11  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.42   0a    2   10  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.28   0a    1   12  FC:A   0  FCAL 15000 272000/557056000  274845/562884296

    RAID group /aggr0/plex0/rg3 (normal, block checksums)

      RAID Disk Device  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------  ------------- ---- ---- ---- ----- --------------    --------------
      dparity   0a.19   0a    1   3   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      parity    0a.29   0a    1   13  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.28   0c    1   12  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.29   0c    1   13  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.43   0c    2   11  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.44   0c    2   12  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.54   0c    3   6   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0c.53   0c    3   5   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0c.52   0c    3   4   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0a.45   0a    2   13  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.50   0c    3   2   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0c.49   0c    3   1   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0c.48   0c    3   0   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0c.55   0c    3   7   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.45   0c    2   13  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.60   0c    3   12  FC:A   0  FCAL 15000 272000/557056000  274845/562884296

    RAID group /aggr0/plex0/rg4 (normal, block checksums)

      RAID Disk Device  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------  ------------- ---- ---- ---- ----- --------------    --------------
      dparity   0c.59   0c    3   11  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      parity    0c.58   0c    3   10  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.57   0c    3   9   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.56   0c    3   8   FC:A   0  FCAL 15000 272000/557056000  274845/562884296

Pool0 spare disks

RAID Disk       Device  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
---------       ------  ------------- ---- ---- ---- ----- --------------    --------------
Spare disks for block checksum
spare           0c.51   0c    3   3   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
spare           0a.48   0a    3   0   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0a.49   0a    3   1   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0a.50   0a    3   2   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0a.51   0a    3   3   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0a.52   0a    3   4   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0a.53   0a    3   5   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0a.54   0a    3   6   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0a.55   0a    3   7   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0a.56   0a    3   8   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0a.57   0a    3   9   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0a.58   0a    3   10  FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0a.59   0a    3   11  FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0c.61   0c    3   13  FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           1a.60   1a    3   12  FC:B   0   ATA  7200 635555/1301618176 635858/1302238304
spare           1d.28   1d    1   12  FC:A   0   ATA  7200 635555/1301618176 635858/1302238304
spare           1a.84   1a    5   4   FC:B   0   ATA  7200 847555/1735794176 847827/1736350304
spare           1d.86   1d    5   6   FC:A   0   ATA  7200 847555/1735794176 847827/1736350304

As you can see there are usually 16 disks in a raid group, except for raid group 4 which has only 4 disks. This raid group is a so called hotspot and brings down the overall performance of teh filer. There are 14 spare disks of the same type (FCAL) available, of which two need to remain a spare disk (that's a best practice by NetApp). So 12 disks will be added to raid group 4.

Upgrade

First, to be sure everything is correct you could try to add the disks without upgrading the aggregate to 64bits. This will result in an error:

filer01> aggr add aggr0 12
File system size 18.15 TB exceeds maximum 15.99 TB
Addition of disks failed. To proceed with this operation, and upgrade the aggregate from 32-bit format to 64-bit format, follow these steps:
1.  Run the "aggr add" command with the "-64bit-upgrade check" option to determine whether there is enough free space for the 64-bit upgrade.
2.  Resolve any space issues identified by the "-64bit-upgrade check" option.
3.  Run the "aggr add" command with the "-64bit-upgrade normal" option to add the disks and trigger 64-bit upgrade on the aggregate aggr0.

aggr add: Cannot add specified disks to the aggregate because aggregates in 32-bit block format cannot be larger than 16TB.

Then perform an upgrade check. Note that this is an time consuming process. For the configuration you find above (plusminus 14 TB) this took over two hours. You also get no prompt, but if you loose your connection you can reconnect, you still have no prompt and output will still be shown:

filer01> aggr add aggr0 -64bit-upgrade check 12
File system size 18.15 TB exceeds maximum 15.99 TB
Checking for additional space required to upgrade all writable 32-bit
volumes in aggregate aggr0 (Ctrl-C to interrupt)......

Upgrading a volume to 64-bit consumes additional free space in the volume. The
following table shows the space usage after each volume is upgraded to 64-bit:

Volume Name             Total          Used           Available      Capacity
-----------             -----          ----           ---------      --------
 vol0                   26GB           5379MB         20GB           20%
 Volume_1               222GB          216GB          5643MB         97%
 Volume_2               400GB          336GB          63GB           84%
 Volume_3               1843GB         1524GB         318GB          82%

Adding the specified disks and upgrading the aggregate to
64-bit will add 2868GB of usable space to the aggregate.

To initiate the 64-bit upgrade of aggregate aggr0, run this
command with the "normal" option.

Then, if everything is normal, start the actual upgrade. Note that at our site this also took two hours:

filer01> aggr add aggr0 -64bit-upgrade normal 12
File system size 18.15 TB exceeds maximum 15.99 TB
Checking for additional space required to upgrade all writable 32-bit
volumes in aggregate aggr0 (Ctrl-C to interrupt)......

Check Progress

You can see the status of the aggregate:

filer01> aggr status aggr0
           Aggr State           Status            Options
          aggr0 online          raid_dp, aggr     root
                                growing
                                redirect
                                32-bit

                Volumes: vol0, Volume_1, Volume_2, Volume_3

                Plex /aggr0/plex0: online, normal, active
                    RAID group /aggr0/plex0/rg0: normal, block checksums
                    RAID group /aggr0/plex0/rg1: normal, block checksums
                    RAID group /aggr0/plex0/rg2: normal, block checksums
                    RAID group /aggr0/plex0/rg3: normal, block checksums
                    RAID group /aggr0/plex0/rg4: normal, block checksums

And if you go into advanced mode you can see the upgrade process status:

filer01> priv set advanced
Warning: These advanced commands are potentially dangerous; use
         them only when directed to do so by IBM
         personnel.
filer01*> aggr 64bit-upgrade status aggr0 -all
      Volume  Format    Scanner Status    % Completed  Time to Completion  Progress
       aggr0  upgrading running           8            26157               fbn 164838400, inode 10878 of 32781, private
        vol0  64-bit
    Volume_1  64-bit
    Volume_2  64-bit
    Volume_3  upgrading running           1            26567               fbn 109903980, inode 2608501 of 33554409, public

When done the previous command looks like this:

filer01*> aggr 64bit-upgrade status aggr0 -all
      Volume  Format    Scanner Status    % Completed  Time to Completion  Progress
       aggr0  64-bit
        vol0  64-bit
    Volume_1  64-bit
    Volume_2  64-bit
    Volume_3  64-bit

And you can now also see that the aggregate status has changed to 64 bits:

filer01> aggr status
           Aggr State           Status            Options
          aggr0 online          raid_dp, aggr     root
                                redirect
                                64-bit
     aggr1_SATA online          raid_dp, aggr     nosnap=on
                                32-bit
     aggr2_SATA online          raid_dp, aggr     raidsize=16
                                32-bit

Also, raid group 4 now has 16 disks just like the others, and there are only 2 FCAL disks left as spare:

filer01> sysconfig -r
Aggregate aggr0 (online, raid_dp, redirect) (block checksums)
  Plex /aggr0/plex0 (online, normal, active, pool0)
    RAID group /aggr0/plex0/rg0 (normal, block checksums)

      RAID Disk Device  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------  ------------- ---- ---- ---- ----- --------------    --------------
      dparity   0a.16   0a    1   0   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      parity    0a.32   0a    2   0   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.16   0c    1   0   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.32   0c    2   0   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.17   0a    1   1   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.17   0c    1   1   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.33   0a    2   1   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.33   0c    2   1   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.18   0a    1   2   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.18   0c    1   2   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.34   0a    2   2   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.34   0c    2   2   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.27   0a    1   11  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.19   0c    1   3   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.35   0a    2   3   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.35   0c    2   3   FC:A   0  FCAL 15000 272000/557056000  274845/562884296

    RAID group /aggr0/plex0/rg1 (normal, block checksums)

      RAID Disk Device  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------  ------------- ---- ---- ---- ----- --------------    --------------
      dparity   0c.20   0c    1   4   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      parity    0a.36   0a    2   4   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.36   0c    2   4   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.20   0a    1   4   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.21   0c    1   5   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.37   0a    2   5   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.37   0c    2   5   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.21   0a    1   5   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.22   0c    1   6   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.38   0a    2   6   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.38   0c    2   6   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.22   0a    1   6   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.23   0c    1   7   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.39   0a    2   7   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.39   0c    2   7   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.23   0a    1   7   FC:A   0  FCAL 15000 272000/557056000  274845/562884296

    RAID group /aggr0/plex0/rg2 (normal, block checksums)

      RAID Disk Device  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------  ------------- ---- ---- ---- ----- --------------    --------------
      dparity   0a.40   0a    2   8   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      parity    0c.24   0c    1   8   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.24   0a    1   8   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.40   0c    2   8   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.41   0a    2   9   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.25   0c    1   9   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.25   0a    1   9   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.41   0c    2   9   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.44   0a    2   12  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.26   0c    1   10  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.26   0a    1   10  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.42   0c    2   10  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.43   0a    2   11  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.27   0c    1   11  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.42   0a    2   10  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.28   0a    1   12  FC:A   0  FCAL 15000 272000/557056000  274845/562884296

    RAID group /aggr0/plex0/rg3 (normal, block checksums)

      RAID Disk Device  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------  ------------- ---- ---- ---- ----- --------------    --------------
      dparity   0a.19   0a    1   3   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      parity    0a.29   0a    1   13  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.28   0c    1   12  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.29   0c    1   13  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.43   0c    2   11  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.44   0c    2   12  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.54   0c    3   6   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0c.53   0c    3   5   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0c.52   0c    3   4   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0a.45   0a    2   13  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.50   0c    3   2   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0c.49   0c    3   1   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0c.48   0c    3   0   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0c.55   0c    3   7   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.45   0c    2   13  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.60   0c    3   12  FC:A   0  FCAL 15000 272000/557056000  274845/562884296

    RAID group /aggr0/plex0/rg4 (normal, block checksums)

      RAID Disk Device  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------  ------------- ---- ---- ---- ----- --------------    --------------
      dparity   0c.59   0c    3   11  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      parity    0c.58   0c    3   10  FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.57   0c    3   9   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0c.56   0c    3   8   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.48   0a    3   0   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0c.51   0c    3   3   FC:A   0  FCAL 15000 272000/557056000  274845/562884296
      data      0a.49   0a    3   1   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0c.61   0c    3   13  FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0a.50   0a    3   2   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0a.51   0a    3   3   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0a.52   0a    3   4   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0a.53   0a    3   5   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0a.54   0a    3   6   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0a.55   0a    3   7   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0a.56   0a    3   8   FC:A   0  FCAL 15000 272000/557056000  280104/573653840
      data      0a.57   0a    3   9   FC:A   0  FCAL 15000 272000/557056000  280104/573653840


Pool0 spare disks

RAID Disk       Device  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
---------       ------  ------------- ---- ---- ---- ----- --------------    --------------
Spare disks for block checksum
spare           0a.58   0a    3   10  FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           0a.59   0a    3   11  FC:A   0  FCAL 15000 272000/557056000  280104/573653840
spare           1a.60   1a    3   12  FC:B   0   ATA  7200 635555/1301618176 635858/1302238304
spare           1d.28   1d    1   12  FC:A   0   ATA  7200 635555/1301618176 635858/1302238304
spare           1a.84   1a    5   4   FC:B   0   ATA  7200 847555/1735794176 847827/1736350304
spare           1d.86   1d    5   6   FC:A   0   ATA  7200 847555/1735794176 847827/1736350304

Post Upgrade/Expansion Tasks

When you've added disks to an aggregate you'll notice almost immediately that the performance of te filer will drop. Since the newly added disks are empty, and WAFL will write preferebly to empty disks (to distribute load) the new disks get all the new data. And new data is more accessed than old data, so the newly added disks are a so called hot spot. You must now reallocate the data to prevent this situation.

Note: This is a lengthy process depending on the size of your volumes and will degrade performance even more. At our site we had some serious issues because of this and we had to stop it (meaning it will have to be done all over) and find a maintenance window of over 30 hours where we could live with degraded performance.
Note2: This really impacted high IO VMs, so really be carefull.

For every volume in the aggregate run this command:

filer01> reallocate start -f /vol/Volume_1
Reallocation scan will be started on '/vol/Volume_1'.
Monitor the system log for results.

Monitor the status like this:

filer01> reallocate status -v
Reallocation scans are on
/vol/Volume_1:
        State: Reallocating: public inofile, block 190656 of 1597829 (11%)
        Flags: doing_force,whole_vol
    Threshold: 4
     Schedule: n/a
     Interval: n/a
 Optimization: n/a

Note that running the reallocate command is not possible for volumes with snapshots since these are readonly. Also note that you cannot suspend this process. You need to schedule this before that's possible:

filer01> reallocate quiesce /vol/Volume_1
Unable to quiesce reallocation on '/vol/Volume_1': scan runs once-only.

Also note, that after running this process all of our performance issues that has arisen since the adding of storage and starting reallocation processes were gone.

You could leave a comment if you were logged in.
netappaggrexpansion.txt · Last modified: 2013/04/20 09:08 by sjoerd