<div dir="ltr">Linux LVM2 has been around for several years now. It can take and use snapshots, and I do it for the last three or so years on <u>production</u> sites. <div>There are limitations, such as space utilization and performance, but the most significant one is that LVM snapshots are nowhere near NetApp snapshots. Check BTRFS or ZFS for such behavior.</div>
<div><br></div><div>Ez<br><br><div class="gmail_quote">2010/9/10 Erez D <span dir="ltr"><<a href="mailto:erez0001@gmail.com">erez0001@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 .8ex;border-left:1px #ccc solid;border-right:1px #ccc solid;padding-left:1ex;padding-right:1ex">
<div dir="ltr">here is my 3 cents:<br><br>In two companies i worked for, i designed similiar servers.<br><br>1. i wanted to have as less as a down time, and i didn't want to buy another server just to sit and wait for a failure, so i decided it should work on any pc with any raid controller - i decided to do the raid in software, so it will be hardware independant - in case of hardware failure - just get any pc with any raid controller ( the disks may even be connected via usb if you do not have a raid controller) and everything is up in minutes.<br>
<br>2. I wanted to have snapshots like in a net-app - making snapshots every hour or so. using the most up to date redhat distributions of that time - when creating a snapshot, once in a while the server got locked (dead).<br>
i tried it again when LVM2 was officially released, and got similiar results. so as they say "once bitten, twice shy" - I will take a lot of proof LVM is stable enough for snapshots, before i try it again.<br><br>
3. linux caches the disk data before it writes it to disk. this is very good for performance, but may create a big data loss in case of power failure...<br><br><br>cheers,<br>erez.<br><br><div class="gmail_quote"><div class="im">
2010/9/9 Hetz Ben Hamo <span dir="ltr"><<a href="mailto:hetzbh@gmail.com" target="_blank">hetzbh@gmail.com</a>></span><br>
</div><blockquote class="gmail_quote" style="margin:0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);border-right:1px solid rgb(204, 204, 204);padding-left:1ex;padding-right:1ex"><div dir="rtl"><div dir="ltr">Hi people,</div>
<div><div></div><div class="h5">
<div dir="ltr">I'm planning to add some big storage solution to my <a href="http://hetz.biz" target="_blank">VPS business</a>. I did some checking and calculated the costs, and figured out that if I want to have a decent 12TB solution NAS box, it would be best if I would roll my own. (12 TB before all the RAID stuff, after that it would lot less). All other solutions are very expensive (example: IBM EXP 3000 costs here 6K nis without a single hard disk). </div>
<div dir="ltr"><br></div><div dir="ltr">I'm planning to use hardware based RAID card, minimal Linux distribution and have some offers like iSCSI, NFS, CIFS - the usual suspects.<br clear="all"><br></div><div dir="ltr">
My question is: since I'll use hardware RAID card, which processor and how much RAM should I put in such a machine? Xeon is overkill IIRC.</div><div dir="ltr"><br></div><div dir="ltr">What do you suggest?</div><div dir="ltr">
<br></div><div dir="ltr">Thanks and Shana Tova</div><div dir="ltr">Hetz</div><div dir="ltr"><br>-- <br>my blog (hebrew): <a href="http://benhamo.org" target="_blank">http://benhamo.org</a><br>Skype: heunique<br>MSN: <a href="mailto:hetz-blog@benhamo.org" target="_blank">hetz-blog@benhamo.org</a><br>
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