Resilvering Estimates

[bollar]

I thought some people would be interested in these resilvering ETA estimates generated on the last Seagate Barracuda LP 7200 I had to replace. In short, it took about 24 hours for the estimates to get reasonable and the early "resilver slow" and multi-month completion messages were all gone by about 22 hours. By 36 hours, the estimates were narrowing down into an 84 hour total resilvering process estimate.

Code:

Started:  Sun Nov 11 06:24:01 2012

6:28 pm CST  |  Monday, November 19, 2012
5:23 am CST  |  Monday, November 19, 2012

After Roughly 24 Hours
8:46:47 am CST  |  Thursday, November 15, 2012
5:29:33 am CST  |  Thursday, November 15, 2012
10:09:43 pm CST  |  Wednesday, November 14, 2012
9:50:18 am CST  |  Wednesday, November 14, 2012
2:17:34 pm CST  |  Wednesday, November 14, 2012

After Roughly 48 Hours
6:09:48 pm CST  |  Wednesday, November 14, 2012
6:19:56 pm CST  |  Wednesday, November 14, 2012
5:57:39 pm CST  |  Wednesday, November 14, 2012
6:29:34 pm CST  |  Wednesday, November 14, 2012
4:18:01 pm CST  |  Wednesday, November 14, 2012
3:56:58 pm CST  |  Wednesday, November 14, 2012

I got the data from zpool status and had Wolfram Alpha calculate the completion time from the estimate.

Here's the current pool status. Basically two raidz2 vdevs, one of which was and remains very full. The system was in constant low volume use via AFP and iSCSI.

Code:

                                                   capacity     operations    bandwidth
pool                                            alloc   free   read  write   read  write
--------------------------------------          -----  -----  -----  -----  -----  -----
bollar                                          24.2T  12.1T    700    202  79.7M  18.3M
  raidz2                                        13.6T   885G    497     52  56.1M  3.56M
    gptid/9c8499f6-2508-11e2-9742-0025909434fc      -      -    260     15  9.43M   609K
    gptid/9ce2c58b-2508-11e2-9742-0025909434fc      -      -    262     15  9.46M   609K
    gptid/9d372998-2508-11e2-9742-0025909434fc      -      -    287     15  9.45M   609K
    gptid/9d904660-2508-11e2-9742-0025909434fc      -      -    274     15  9.46M   609K
    gptid/5147c413-25ea-11e2-8582-0025909434fc      -      -    267     15  9.46M   609K
    gptid/9e52063d-2508-11e2-9742-0025909434fc      -      -    247     15  9.46M   609K
    gptid/3cb83b9f-299e-11e2-a7a4-0025909434fc      -      -    313     15  9.40M   609K
    gptid/a7245ace-2bfa-11e2-8d27-0025909434fc      -      -    175    118  4.77M  4.86M
  raidz2                                        10.5T  11.2T    202    150  23.6M  14.8M
    gptid/d85ff4f4-2aa4-11e2-8725-0025909434fc      -      -     89     39  4.04M  2.62M
    gptid/d928bfea-2aa4-11e2-8725-0025909434fc      -      -     90     38  4.04M  2.62M
    gptid/da1fb860-2aa4-11e2-8725-0025909434fc      -      -     89     39  4.04M  2.62M
    gptid/dbc24af8-2aa4-11e2-8725-0025909434fc      -      -     87     39  4.04M  2.62M
    gptid/ddc88ae3-2aa4-11e2-8725-0025909434fc      -      -     89     39  4.04M  2.62M
    gptid/dfc1d04c-2aa4-11e2-8725-0025909434fc      -      -     88     39  4.04M  2.62M
    gptid/e174dea7-2aa4-11e2-8725-0025909434fc      -      -     86     39  4.04M  2.62M
    gptid/e2fcb3e9-2aa4-11e2-8725-0025909434fc      -      -     88     39  4.04M  2.62M
--------------------------------------          -----  -----  -----  -----  -----  -----

And the drive list:

Code:

<ATA ST32000542AS CC34>            at scbus0 target 0 lun 0 (pass0,da0)
<ATA ST32000542AS CC32>            at scbus0 target 1 lun 0 (pass1,da1)
<ATA ST32000542AS CC34>            at scbus0 target 2 lun 0 (pass2,da2)
<ATA ST32000542AS CC34>            at scbus0 target 3 lun 0 (pass3,da3)
<ATA ST2000DL001-9VT1 CC41>        at scbus0 target 5 lun 0 (pass5,da5)
<ATA ST32000542AS CC34>            at scbus0 target 6 lun 0 (pass6,da6)
<ATA ST32000542AS CC34>            at scbus0 target 7 lun 0 (pass7,da7)
<ATA ST2000DL003-9VT1 CC32>        at scbus0 target 8 lun 0 (da17,pass4)
<ATA Hitachi HDS72303 A3B0>        at scbus1 target 0 lun 0 (pass8,da8)
<ATA Hitachi HDS72303 A5C0>        at scbus1 target 1 lun 0 (pass9,da9)
<ATA ST3000DM001-9YN1 CC4C>        at scbus1 target 2 lun 0 (pass10,da10)
<ATA ST3000DM001-9YN1 CC4C>        at scbus1 target 3 lun 0 (pass11,da11)
<ATA Hitachi HDS72303 A5C0>        at scbus1 target 4 lun 0 (pass12,da12)
<ATA Hitachi HDS72303 A580>        at scbus1 target 5 lun 0 (pass13,da13)
<ATA Hitachi HDS72303 A580>        at scbus1 target 6 lun 0 (pass14,da14)
<ATA Hitachi HDS72303 A3B0>        at scbus1 target 7 lun 0 (pass15,da15)

 

[fracai]

How about some pool info? Capacity? Used / Referenced space? Number of disks? Arrangement? Did you continue to use the pool during the resilver? What did that use look like?

 

[bollar]

Good idea. Added to the original message.