Dear =?ISO-8859-15?Q?Stefan_/*St0fF*/_H=FCbner?=, In message <4D361F26.3060507@xxxxxxxxxxxxxxxxxx> you wrote: > > [in German:] Schätzelein, Dein Problem sind die Platten, nicht der > Controller. > > [in English:] Dude, the disks are your bottleneck. ... Maybe we can stop speculations about what might be the cause of the problems in some setup I do NOT intend to use, and rather discuss the questions I asked. > > I will have 4 x 1 TB disks for this setup. > > > > The plan is to build a RAID0 from the 4 devices, create a physical > > volume and a volume group on the resulting /dev/md?, then create 2 or > > 3 logical volumes that will be used as XFS file systems. Clarrification: I'll run /dev/md* on the raw disks, without any partitions on them. > > My goal is to optimize for maximum number of I/O operations per > > second. ... > > > > Is this a reasonable approach for such a task? > > > > Should I do anything different to acchive maximum performance? > > > > What are the tunables in this setup? [It seems the usual recipies are > > more oriented in maximizing the data troughput for large, mostly > > sequential accesses - I figure that things like increasing read-ahead > > etc. will not help me much here?] So can anybody help answering these questions: - are there any special options when creating the RAID0 to make it perform faster for such a use case? - are there other tunables, any special MD / LVM / file system / read ahead / buffer cache / ... parameters to look for? Thanks. Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@xxxxxxx Boykottiert Microsoft - Kauft Eure Fenster bei OBI! -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
