Re: [zfs-discuss] ZFS over iSCSI question

2007-03-24 Thread Joerg Schilling
Thomas Nau [EMAIL PROTECTED] wrote: fflush(fp); fsync(fileno(fp)); fclose(fp); and check errors. (It's remarkable how often people get the above sequence wrong and only do something like fsync(fileno(fp)); fclose(fp); Thanks for clarifying! Seems I really need to

[zfs-discuss] missing features?Could/should zfs support a new ioctl, constrained if neede

2007-03-24 Thread Richard L. Hamilton
_FIOSATIME - why doesn't zfs support this (assuming I didn't just miss it)? Might be handy for backups. Could/should zfs support a new ioctl, constrained if needed to files of zero size, that sets an explicit (and fixed) blocksize for a particular file? That might be useful for performance in

Re: [zfs-discuss] Re: asize is 300MB smaller than lsize - why?

2007-03-24 Thread Matthew Ahrens
Kangurek wrote: Thanks for info. My idea was to traverse changing filesystem, now I see that it will not work. I will try to traverse snapshots. Zreplicate will: 1. do snapshot @replicate_leatest and 2. send data to snapshot @replicate_leatest 3. wait X sec ( X = 20 ) 4. remove

Re: [zfs-discuss] ZFS over iSCSI question

2007-03-24 Thread Frank Cusack
On March 23, 2007 11:06:33 PM -0700 Adam Leventhal [EMAIL PROTECTED] wrote: On Fri, Mar 23, 2007 at 11:28:19AM -0700, Frank Cusack wrote: I'm in a way still hoping that it's a iSCSI related Problem as detecting dead hosts in a network can be a non trivial problem and it takes quite some time

Re: [zfs-discuss] Re: asize is 300MB smaller than lsize - why?

2007-03-24 Thread Neil Perrin
Matthew Ahrens wrote On 03/24/07 12:13,: Kangurek wrote: Thanks for info. My idea was to traverse changing filesystem, now I see that it will not work. I will try to traverse snapshots. Zreplicate will: 1. do snapshot @replicate_leatest and 2. send data to snapshot @replicate_leatest 3.

Re: [zfs-discuss] Re: asize is 300MB smaller than lsize - why?

2007-03-24 Thread Matthew Ahrens
Neil Perrin wrote: I'm not sure exactly what will be slow about taking snapshots, but one aspect might be that we have to suspend the intent log (see call to zil_suspend() in dmu_objset_snapshot_one()). I've been meaning to change that for a while now -- just let the snapshot have the

Re: [zfs-discuss] Re: asize is 300MB smaller than lsize - why?

2007-03-24 Thread Neil Perrin
Matthew Ahrens wrote On 03/24/07 12:36,: Neil Perrin wrote: I'm not sure exactly what will be slow about taking snapshots, but one aspect might be that we have to suspend the intent log (see call to zil_suspend() in dmu_objset_snapshot_one()). I've been meaning to change that for a while

Re: [zfs-discuss] ZFS over iSCSI question

2007-03-24 Thread Brian Hechinger
On Sat, Mar 24, 2007 at 11:20:38AM -0700, Frank Cusack wrote: iscsi doesn't use TCP, does it? Anyway, the problem is really transport independent. It does use TCP. Were you thinking UDP? or its own IP protocol. I wouldn't have thought iSCSI would want to be subject to the vagaries of