multiple concurrent scrubs

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multiple concurrent scrubs

Post by grahamperrin » Wed Oct 10, 2012 1:49 am

Spun off from Automated zpool check and scrub

So far, no problems with concurrent scrubs of three pools. Performance of the computer feels fine. One pool on each of the following:

  • Seagate ST750LX003-1AC154, internal to a MacBookPro5,2 with 8 GB memory running OS X 10.8.2 (around 100 GB of the disk given to JHFS+ for the OS and apps; CoreStorage encrypting both JHFS+ and ZFS file systems)
  • StoreJet Transcend (0x2329) in the frontmost USB port
  • Sitecom USB 2.0 Dock CN-022 (0x0022) in the rearmost port (separate bus) with a Seagate GoFlex Desk (0x50a5).

YMMV.

I'm very pleased to note that following eject then reconnection of an external disk, scrub will resume. (Before now, I wondered whether the automated resume applied only to checkups that were initiated using the ZEVO pane of System Preferences.)

Screen recording etc. at http://www.wuala.com/grahamperrin/publi ... de=gallery

Code: Select all
macbookpro08-centrim:bin gjp22$ zpool status | grep "to go"
    51.8Gi scanned out of 380Gi at 28.7Mi/s, 3h15m to go
    37.6Gi scanned out of 1.75Ti at 20.9Mi/s, 23h54m to go
    40.8Gi scanned out of 555Gi at 19.9Mi/s, 7h22m to go
macbookpro08-centrim:bin gjp22$ date
Wed 10 Oct 2012 07:31:58 BST
macbookpro08-centrim:bin gjp22$ zpool status | grep "to go"
    62.8Gi scanned out of 380Gi at 28.3Mi/s, 3h11m to go
    48.1Gi scanned out of 1.75Ti at 21.7Mi/s, 22h48m to go
    51.9Gi scanned out of 555Gi at 23.7Mi/s, 6h2m to go
macbookpro08-centrim:bin gjp22$ date
Wed 10 Oct 2012 07:41:43 BST
macbookpro08-centrim:bin gjp22$ zpool status | grep "to go"
    69.0Gi scanned out of 380Gi at 24.7Mi/s, 3h34m to go
    64.1Gi scanned out of 1.75Ti at 23.0Mi/s, 21h20m to go
    66.1Gi scanned out of 555Gi at 24.2Mi/s, 5h45m to go
macbookpro08-centrim:bin gjp22$ zpool list
NAME      SIZE   ALLOC    FREE     CAP  HEALTH  ALTROOT
gjp22    572Gi   381Gi   191Gi     66%  ONLINE  -
tall    1.82Ti  1.75Ti  70.5Gi     96%  ONLINE  -
zhandy   592Gi   555Gi  36.8Gi     93%  ONLINE  -
macbookpro08-centrim:bin gjp22$ 


(For two of the three: the percentages currently and previously used have a negative impact on current performance. That should be a separate topic.)
grahamperrin Offline

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