Date: Tue, 16 Feb 1999 22:48:10 -0800 From: Don Lewis <Don.Lewis@tsc.tdk.com> To: Leif Neland <root@neland.dk>, Greg Lehey <grog@lemis.com> Cc: "Bryn Wm. Moslow" <bryn@spacemonster.org>, freebsd-isp@FreeBSD.ORG Subject: Re: DPT 3334UW RAID-5 Slowness / Weird FS problems Message-ID: <199902170648.WAA15110@salsa.gv.tsc.tdk.com> In-Reply-To: Leif Neland <root@neland.dk> "Re: DPT 3334UW RAID-5 Slowness / Weird FS problems" (Feb 17, 6:18am)
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On Feb 17, 6:18am, Leif Neland wrote: } Subject: Re: DPT 3334UW RAID-5 Slowness / Weird FS problems } I ran out of inodes on a news spool with 4K pr inode. When not carrying binaries, I recommend 2K per inode when using a 4K/1K filesystem. Here's the statistics on our news spool. Filesystem 1K-blocks Used Avail Capacity iused ifree %iused /dev/da2s1e 1980883 1635136 187276 90% 628652 283186 69% Even at 2K per inode, cylinder groups that happen to contain directories for groups containing a lot of articles will run out of inodes in those cylinder groups. This will force inodes to be allocated from other groups for articles stored in those directories, which will increase the average seek distance and hurt performance. # dumpfs /dev/rda2s1e | grep nifree nbfree 76249 ndir 3755 nifree 282333 nffree 76234 cs[].cs_(nbfree,ndir,nifree,nffree): nbfree 108 ndir 17 nifree 0 nffree 1034 nbfree 12 ndir 10 nifree 0 nffree 399 nbfree 11 ndir 16 nifree 0 nffree 715 nbfree 0 ndir 22 nifree 1337 nffree 209 nbfree 0 ndir 17 nifree 0 nffree 333 nbfree 39 ndir 17 nifree 0 nffree 393 nbfree 0 ndir 15 nifree 0 nffree 649 nbfree 0 ndir 22 nifree 0 nffree 246 nbfree 0 ndir 22 nifree 0 nffree 198 nbfree 308 ndir 13 nifree 0 nffree 849 nbfree 0 ndir 17 nifree 1697 nffree 549 nbfree 0 ndir 18 nifree 1086 nffree 342 nbfree 0 ndir 17 nifree 558 nffree 199 nbfree 0 ndir 17 nifree 1889 nffree 324 nbfree 0 ndir 17 nifree 0 nffree 433 nbfree 0 ndir 20 nifree 1126 nffree 296 nbfree 0 ndir 20 nifree 0 nffree 369 nbfree 0 ndir 17 nifree 1631 nffree 782 nbfree 0 ndir 17 nifree 1622 nffree 437 nbfree 0 ndir 16 nifree 153 nffree 368 nbfree 0 ndir 18 nifree 775 nffree 309 nbfree 0 ndir 17 nifree 320 nffree 308 nbfree 0 ndir 16 nifree 497 nffree 157 nbfree 0 ndir 22 nifree 2241 nffree 820 nbfree 0 ndir 14 nifree 830 nffree 354 nbfree 0 ndir 22 nifree 363 nffree 517 nbfree 0 ndir 5 nifree 178 nffree 1023 nbfree 0 ndir 20 nifree 682 nffree 553 nbfree 80 ndir 17 nifree 2030 nffree 499 nbfree 25 ndir 18 nifree 610 nffree 625 nbfree 0 ndir 12 nifree 0 nffree 780 ... To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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