Re: [lustre-discuss] Questions about migrate OSTs from ldiskfs to zfs

2016-03-01 Thread Alexander I Kulyavtsev
Is there way to run 2.5.3-llnl server with 1.8.9 client? Or, do you have a hint what can be a problem causing LBUG when mounting two lustres (old 1.8.8 and new 2.5.3) from 1.8.9 client? No ldiskfs on new system, ZFS only. I'm copying my previous posting at the end of the mail for specific error.

Re: [lustre-discuss] fetching a histogram of idx counts

2016-03-01 Thread Mohr Jr, Richard Frank (Rick Mohr)
> On Mar 1, 2016, at 4:17 PM, John White wrote: > > I’m trying to figure out an efficient way to get a global count of > objects per idx. I can do it through an horribly inefficient find + lfs > getstripe, but I’d really like to figure out a way not to have to touch the > posix layer o

Re: [lustre-discuss] fetching a histogram of idx counts

2016-03-01 Thread Dilger, Andreas
Running "lfs df -i" is probably what you want? Cheers, Andreas > On Mar 2, 2016, at 05:18, John White wrote: > > Good Afternoon Folks, >I’m trying to figure out an efficient way to get a global count of objects > per idx. I can do it through an horribly inefficient find + lfs getstripe,

Re: [lustre-discuss] Questions about migrate OSTs from ldiskfs to zfs

2016-03-01 Thread Christopher J. Morrone
On 03/01/2016 01:44 PM, Drokin, Oleg wrote: > > On Mar 1, 2016, at 4:14 PM, Christopher J. Morrone wrote: > >> On 03/01/2016 09:18 AM, Alexander I Kulyavtsev wrote: >> >>> is tag 2.5.3.90 considered stable? >> >> No. Generally speaking you do not want to use anything with number 50 >> or greater

Re: [lustre-discuss] Questions about migrate OSTs from ldiskfs to zfs

2016-03-01 Thread Dilger, Andreas
On Mar 2, 2016, at 01:18, Alexander I Kulyavtsev mailto:a...@fnal.gov>> wrote: Please see inlined. On Feb 26, 2016, at 6:36 PM, Dilger, Andreas mailto:andreas.dil...@intel.com>> wrote: On Feb 23, 2016, at 05:24, Fernando Perez mailto:fpe...@icm.csic.es>> wrote: Hi all. ... snip... - Dou you

Re: [lustre-discuss] Questions about migrate OSTs from ldiskfs to zfs

2016-03-01 Thread Drokin, Oleg
On Mar 1, 2016, at 4:14 PM, Christopher J. Morrone wrote: > On 03/01/2016 09:18 AM, Alexander I Kulyavtsev wrote: > >> is tag 2.5.3.90 considered stable? > > No. Generally speaking you do not want to use anything with number 50 > or greater for the fourth number unless you are helping out with

[lustre-discuss] The difference between failnode and servicenode

2016-03-01 Thread Kurt Strosahl
Hello, I'm curious as to the difference between the --failnode and --servicenode options used by mkfs.lustre. On an OST these options are used to for ost failover, not mgs failover (which is done through the --mgsnode parameter), but what is the difference between a failnode and a service n

[lustre-discuss] fetching a histogram of idx counts

2016-03-01 Thread John White
Good Afternoon Folks, I’m trying to figure out an efficient way to get a global count of objects per idx. I can do it through an horribly inefficient find + lfs getstripe, but I’d really like to figure out a way not to have to touch the posix layer of lustre to do this. Any ideas?

Re: [lustre-discuss] Questions about migrate OSTs from ldiskfs to zfs

2016-03-01 Thread Christopher J. Morrone
On 03/01/2016 09:18 AM, Alexander I Kulyavtsev wrote: > is tag 2.5.3.90 considered stable? No. Generally speaking you do not want to use anything with number 50 or greater for the fourth number unless you are helping out with testing during the development process. 2.5.3 was the last official r

Re: [lustre-discuss] Questions about migrate OSTs from ldiskfs to zfs

2016-03-01 Thread Alexander I Kulyavtsev
Please see inlined. On Feb 26, 2016, at 6:36 PM, Dilger, Andreas mailto:andreas.dil...@intel.com>> wrote: On Feb 23, 2016, at 05:24, Fernando Perez mailto:fpe...@icm.csic.es>> wrote: Hi all. ... snip... - Dou you recommend to do a lustre update before replace the OSTs by the new zfs OSTs? L