Date: Thu, 01 Sep 2005 18:17:10 +1000 From: Norberto Meijome <freebsd@meijome.net> To: Holger Kipp <hk@alogis.com> Cc: freebsd-amd64@freebsd.org Subject: Re: Which SCHED_ for DB server Message-ID: <4316B906.50002@meijome.net> In-Reply-To: <20050901075851.GA19900@intserv.int1.b.intern> References: <4316A5BC.1000405@meijome.net> <20050901075851.GA19900@intserv.int1.b.intern>
next in thread | previous in thread | raw e-mail | index | archive | help
Holger Kipp wrote: > Hello, > >>4 x SATA 150 drives, 90% of it RAID5 with gvinum. > > > I do not know your applications, but if writing to disk is an issue: > > - WAL-files should be written to physically separated disks. sorry, what do you mean by WAL-files > - Write performance to RAID5 is not very good (tm). > This is both with softraid and with hardware raid, although > those raid controllers with 64MB or higher (+batterybackup) > might increase the visible performance if only a few processes > generate disk-i/o-load. > - ATA is not good for production - better use SCSI. I hear you... Budget reasons forced me to use this. I could go RAID10, but I'd lose about 200 GB which I probably will need. thanks
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4316B906.50002>