Re: [lustre-discuss] free space on ldiskfs vs. zfs

2015-08-25 Thread Götz Waschk
Dear All, I'm sorry, I cannot provide verbose zpool information anymore. I was a bit in a hurry to put the file system into production and that's why I have reformatted the servers with ldiskfs. On Tue, Aug 25, 2015 at 5:54 AM, Alexander I Kulyavtsev a...@fnal.gov wrote: I was assuming the

Re: [lustre-discuss] free space on ldiskfs vs. zfs

2015-08-24 Thread Christopher J. Morrone
If you provide the zpool list -v output it might give us a little clearer view of what you have going on. Chris On 08/19/2015 06:18 AM, Götz Waschk wrote: Dear Lustre experts, I have configured two different Lustre instances, both using Lustre 2.5.3, one with ldiskfs on RAID-6 hardware RAID

Re: [lustre-discuss] free space on ldiskfs vs. zfs

2015-08-24 Thread Alexander I Kulyavtsev
Same question here. 6TB/65TB is 11% . In our case about the same fraction was missing. My speculation was, It may happen if at some point between zpool and linux the value reported in TB is interpreted as in TiB, and then converted to TB. Or unneeded conversion MB to MiB done twice, etc.

Re: [lustre-discuss] free space on ldiskfs vs. zfs

2015-08-24 Thread Christopher J. Morrone
I could be wrong, but I don't think that the original poster was asking why the SIZE field of zpool list was wrong, but rather why the AVAIL space in zfs list was lower than he expected. I would find it easier to answer the question if I knew his drive count and drive size. Chris On

Re: [lustre-discuss] free space on ldiskfs vs. zfs

2015-08-24 Thread Alexander I Kulyavtsev
Hmm, I was assuming the question was about total space as I struggled for some time to understand why do I have 99 TB total available space per OSS, after installing zfs lustre, while ldiskfs OSTs have 120 TB on the same hardware. The 20% difference was partially (10%) accounted by different

[lustre-discuss] free space on ldiskfs vs. zfs

2015-08-19 Thread Götz Waschk
Dear Lustre experts, I have configured two different Lustre instances, both using Lustre 2.5.3, one with ldiskfs on RAID-6 hardware RAID and one using ZFS and RAID-Z2, using the same type of hardware. I was wondering, why I 24 TB less space available, when I should have the same amount of parity