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CSI-BITC cluster storage expanding will start (Read 1855 times)
Lei Zhou
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CSI-BITC cluster storage expanding will start
Oct 15th, 2014 at 12:51pm
 
CSI-BITC cluster will start the process of replacing 1TB drives by 4TB drives of a 13 bay array.  This process will expand the capacity of this disk array from 20TB to 40TB, and using the 2TB drives from this array, another 12TB array will be expanded to 24TB.  The still good 1TB drives will be utilized to form an 4TB backend pool for local backup. 
After this process, the total user accessible storage will increase about 32TB, greatly relax the pressure we are having on data processing spaces.
This process will last until the end of this month.  During this process, user data may be shifted around and the system performance may decrease.  Some symbolic links may become invalid. 
Please feel free contacting me if there will be any issues. Cheesy
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Lei Zhou
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Re: CSI-BITC cluster storage expanding will start
Reply #1 - Oct 23rd, 2014 at 4:08pm
 
All 4TB drives are installed.  Shifted off 2TB drives are being installed for expanding an 1TB drive based array.  The progress is two days to go.

All to be expanded drive arrays are doing media check.  Once done, the logical expansion will start. Wink
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Lei Zhou
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Re: CSI-BITC cluster storage expanding will start
Reply #2 - Oct 27th, 2014 at 1:09pm
 
Sad
A back up battary failed on a 2x12TB RAID unit. 
The data migration to the newly expanded RAID array is being postponed until this issue is cleared.
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Re: CSI-BITC cluster storage expanding will start
Reply #3 - Oct 30th, 2014 at 6:56pm
 
The back up batteries have been replaced.

The data migration to new RAIDs has started.

Current progress: 
/data/home2 expanded.
Some users in /data/home are being shifted to larger /data/home2
Data on /data2 are being relocated.
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Lei Zhou
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Re: CSI-BITC cluster storage expanding will start
Reply #4 - Nov 4th, 2014 at 5:22pm
 
Stage 1 - expanding /data/home2 -- completed
Stage 2 - purging data off /data2 /data/home -- completed
Stage 3 - Rebooting host and recreating /data2 and /data/home -- completed
Stage 4 - moving user data back to /data/home and /data2 -- started.
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Lei Zhou
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Re: CSI-BITC cluster storage expanding will start
Reply #5 - Nov 14th, 2014 at 10:54am
 
Stage 4 encounters a problem on /data/home1.  It developed plenty of file system errors about unused spaces.  To prevent data damage.  It has been taken offline and all data are being migrated to /data/home2/home1.  This progress will accomplish this night.  Afterward I will format this partition and migrate the data back over the week end.

The entire stroage expansion is estimated to be done by Monday morning.  Grin
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