immense delayed write to file system (ZFS and UFS2), performance issues

2010-01-18 Thread O. Hartmann
I realise a strange behaviour of several FreeBSD 8.0-STABLE/amd64 boxes. All boxes have the most recent STABLE. One box is a UP system, two others SMP boxes, one with a Q6600 4-core, another XEON with 2x 4-cores (Dell Poweredge III). Symptome: All boxes have ZFS and UFS2 filesystems. Since two

Re: immense delayed write to file system (ZFS and UFS2), performance issues

2010-01-18 Thread Morgan Wesström
O. Hartmann wrote: > I realise a strange behaviour of several FreeBSD 8.0-STABLE/amd64 boxes. > All boxes have the most recent STABLE. One box is a UP system, two > others SMP boxes, one with a Q6600 4-core, another XEON with 2x 4-cores > (Dell Poweredge III). > > Symptome: All boxes have ZFS and

Re: immense delayed write to file system (ZFS and UFS2), performance issues

2010-01-18 Thread Daniel O'Connor
On Tue, 19 Jan 2010, Morgan Wesström wrote: > The disks involved don't happen to be Western Digital Green Power > disks, do they? The Intelli-Park function in these disks are wrecking > havoc with I/O in Linux-land at least, causing massive stalls and > iowait through the roof during the 25-30 seco

Re: immense delayed write to file system (ZFS and UFS2), performance issues

2010-01-19 Thread krad
2010/1/18 Morgan Wesström > O. Hartmann wrote: > > I realise a strange behaviour of several FreeBSD 8.0-STABLE/amd64 boxes. > > All boxes have the most recent STABLE. One box is a UP system, two > > others SMP boxes, one with a Q6600 4-core, another XEON with 2x 4-cores > > (Dell Poweredge III).

Re: immense delayed write to file system (ZFS and UFS2), performance issues

2010-01-19 Thread Morgan Wesström
Emil Mikulic wrote: > (off-list) > > On Tue, Jan 19, 2010 at 04:32:34PM +0100, Morgan Wesstr?m wrote: >> Emil Mikulic wrote: >>> On Tue, Jan 19, 2010 at 09:16:41AM +0100, Gerrit K?hn wrote: Thanks for bringing up this topic here. I have drives showing up close to 80 load cycle counts

Re: immense delayed write to file system (ZFS and UFS2), performance issues

2010-01-19 Thread O. Hartmann
On 01/18/10 21:34, � wrote: O. Hartmann wrote: I realise a strange behaviour of several FreeBSD 8.0-STABLE/amd64 boxes. All boxes have the most recent STABLE. One box is a UP system, two others SMP boxes, one with a Q6600 4-core, another XEON with 2x 4-cores (Dell Poweredge III). Symptome: All

Re: immense delayed write to file system (ZFS and UFS2), performance issues

2010-01-19 Thread O. Hartmann
On 01/19/10 10:09, krad wrote: 2010/1/18 Morgan Wesstr�m O. Hartmann wrote: I realise a strange behaviour of several FreeBSD 8.0-STABLE/amd64 boxes. All boxes have the most recent STABLE. One box is a UP system, two others SMP boxes, one with a Q6600 4-core, another XEON with 2x 4-cores (Dell