Date: Thu, 23 May 2013 14:18:30 +0200 (CEST) From: =?ISO-8859-1?Q?Trond_Endrest=F8l?= <Trond.Endrestol@fagskolen.gjovik.no> To: saeedeh motlagh <saeedeh.motlagh@gmail.com> Cc: freebsd-questions <freebsd-questions@freebsd.org> Subject: Re: file corruption solution (soft-update or ZFS) Message-ID: <alpine.BSF.2.00.1305231416330.72982@mail.fig.ol.no> In-Reply-To: <CAN%2BS=WDGdL5ZabOGp%2BrBshjmrd9so5Q=wMc5sfDGuEAZxLe3%2Bg@mail.gmail.com> References: <CAN%2BS=WC0ThjT6ox9YdUsAb6%2B%2Bf=%2BqfCLuct_tN=jsr3KYTezaw@mail.gmail.com> <alpine.BSF.2.00.1305230554360.98184@wonkity.com> <CAN%2BS=WDGdL5ZabOGp%2BrBshjmrd9so5Q=wMc5sfDGuEAZxLe3%2Bg@mail.gmail.com>
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This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --2055831798-1052084753-1369311510=:72982 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT On Thu, 23 May 2013 16:44+0430, saeedeh motlagh wrote: > thanks for your reply. > > you know i have a sensitive server and unfortunately it is located some > where that power outage happens much. so i want guarantee my data and avoid > data lost and file corruption in my server. Maybe you should also invest in a decent UPS. > i do not have any problem in RAM and hardware. > > i don't know which approach is more suitable for my server. using > soft-update or ZFS. please help me to select the best one. > > thank you so much > > On Thu, May 23, 2013 at 4:28 PM, Warren Block <wblock@wonkity.com> wrote: > > > On Thu, 23 May 2013, saeedeh motlagh wrote: > > > > hello every body > >> > >> i have a question about fixing file corruption in freebsd. > >> > >> now i have freebsd8.2 and some times file corruption happened on it. this > >> issue has a heavy cost for me and i want to avoid it or fixit it > >> completely. so my question is: > >> > >> is it better to upgrade my freebsd to 9.1 and use soft update or migrate > >> from UFS to ZFS? > > > > That's a judgement call, which means "it depends". > > > >> i heard so much about soft update -that is added in freebsd9.1- which can > >> fix file corruption in acceptable way with low cost but i don't know how > >> much is reliable and efficient. > > > > Several things: > > > > Soft updates have been around for quite a while. > > Soft updates journaling is the new addition. > > Neither of these address file corruption. Their purpose is to make sure > > the filesystem does not get corrupted, but individual files could still > > contain bad data. > > > > in the other hand, i think migration from UFS to ZFS can be another > >> solution. as i read ZFS is is created to solve all the problems related > >> integrity file system. is it reliable enough in comparison soft-update? > >> > >> now, i want to know which solution is better and why? > > > > Again, it depends. Does the target system have enough RAM for ZFS? If > > the file corruption is due to a hardware problem or an application writing > > bad data, no filesystem can prevent that. -- +-------------------------------+------------------------------------+ | Vennlig hilsen, | Best regards, | | Trond Endrestøl, | Trond Endrestøl, | | IT-ansvarlig, | System administrator, | | Fagskolen Innlandet, | Gjøvik Technical College, Norway, | | tlf. mob. 952 62 567, | Cellular...: +47 952 62 567, | | sentralbord 61 14 54 00. | Switchboard: +47 61 14 54 00. | +-------------------------------+------------------------------------+ --2055831798-1052084753-1369311510=:72982--
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