Date: Wed, 09 Jan 2013 11:52:40 +0900 (JST) From: Hiroki Sato <hrs@FreeBSD.org> To: jwd@FreeBSD.org Cc: freebsd-fs@FreeBSD.org Subject: Re: rc.d script for memory based zfs intent log Message-ID: <20130109.115240.1198411557684741197.hrs@allbsd.org> In-Reply-To: <20130109023327.GA1888@FreeBSD.org> References: <20130109023327.GA1888@FreeBSD.org>
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----Security_Multipart(Wed_Jan__9_11_52_40_2013_377)-- Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit John <jwd@freebsd.org> wrote in <20130109023327.GA1888@FreeBSD.org>: jw> Hi Folks, jw> jw> Here's an rc.d script that provides a nice performance boost on jw> ZFS/NFS based file servers. It also helps in other areas not specific jw> to NFS. jw> jw> It attaches the log device at system startup and removes it at jw> system shutdown time. Example; jw> jw> memzil_pools="tank" jw> memzil_bootfs="YES" jw> service memzil onestart jw> zpool status tank jw> service memzil onestop jw> jw> This configuration provides a nice performance boost especially to jw> NFS, but also helps in other areas not specific to NFS. jw> jw> Please DO NOT USE this script if your system is not UPS backed, preferably jw> with dual power supplies on separate circuits. If your system crashes you jw> may lose data. The script contains information on recovery. jw> jw> http://people.freebsd.org/~jwd/memzil.txt jw> jw> Comments/Improvements appreciated. Why is simply setting sync=disabled to the ZFS dataset not enough? -- Hiroki ----Security_Multipart(Wed_Jan__9_11_52_40_2013_377)-- Content-Type: application/pgp-signature Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iEYEABECAAYFAlDs23gACgkQTyzT2CeTzy0eIgCeOK4RI451JJEqEu/WS4ssfDpI AE4Anjhn3s0Y9lxCxxjC8Gb8SKCzQVY2 =Wpoa -----END PGP SIGNATURE----- ----Security_Multipart(Wed_Jan__9_11_52_40_2013_377)----
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