From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roman Mamedov Subject: Re: =?UTF-8?B?562U5aSN77yabWQ=?= raid5 performace 6x SSD RAID5 Date: Thu, 28 Nov 2013 10:46:25 +0600 Message-ID: <20131128104625.54a5fc94@natsu> References: <1385118796.8091.31.camel@bews002.euractiv.com> <528FBBE5.80404@hardwarefreak.com> <1385369796.2076.16.camel@bews002.euractiv.com> <5293EF32.9090301@hardwarefreak.com> <20131126025210.GL8803@dastard> <52941C5D.1000305@hardwarefreak.com> <20131126061458.GM8803@dastard> <36ffd6f7-bfb0-4298-a18c-f45b07cab326@aliyun.com> <5296C98D.8000302@hardwarefreak.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/y=vKWhxr_wBpPj8nO15LN2T"; protocol="application/pgp-signature" Return-path: In-Reply-To: <5296C98D.8000302@hardwarefreak.com> Sender: linux-raid-owner@vger.kernel.org To: stan@hardwarefreak.com Cc: lilofile , Linux RAID List-Id: linux-raid.ids --Sig_/y=vKWhxr_wBpPj8nO15LN2T Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Wed, 27 Nov 2013 22:41:49 -0600 Stan Hoeppner wrote: > > when the stripe_cache_size is set 4096.=20 ... > 2. A 4KB stripe cache is too small for 6 SSDs, try 8KB The stripe cache size setting is specified not in KB, but in pages per disk, so a value of 4096 on x86 systems means 4096*4096*6 =3D 96 MB of cache for = the whole array. --=20 With respect, Roman --Sig_/y=vKWhxr_wBpPj8nO15LN2T Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlKWyqEACgkQTLKSvz+PZwgTIgCeOIwIBedGd1gx9rS9PIFKRfNN 3LMAmweg0RdOc96mlwheWpLnH5NmgEEc =u8fl -----END PGP SIGNATURE----- --Sig_/y=vKWhxr_wBpPj8nO15LN2T--