> On Thu, 30 Jun 2005, Matus UHLAR - fantomas wrote: > >BTW I think I've found another reason why RAID should not behave better > >with squid: even SCSI disks behave better on sequential reads. So, > >fetching a file sequentially from a drive (case of multiple filesystems > >on multiple drives) should be faster than fetching some parts (size of a > >stripe) from one disk and some parts from second disk On 30.06 12:07, Henrik Nordstrom wrote: > Luckily for RAID0/5 the stripe size often practically eleminates this > drawback as the percentage of small reads crossing a stripe boundary is > fairly small. but big files that cross stripe boundary more times will still be read from multiple disks. Not that bad as small files, bud still no good. > RAID0 does not give any performance benefit for Squid as Squid already > distributes the load among the cache_dirs. What I meant in my previous post is, that using raid0 might lower the speed a bit comparing to multiple cache_dirs, because it tends to lower count and comprehesiveness of sequential reads/writes -- Matus UHLAR - fantomas, uhlar@xxxxxxxxxxx ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. Linux is like a wigwam: no Windows, no Gates and an apache inside...
