Web site kills hard disk I/O, how to prevent?

Posted by Taras Voynarovsky on Server Fault See other posts from Server Fault or by Taras Voynarovsky
Published on 2011-12-09T18:36:38Z Indexed on 2012/03/27 17:33 UTC
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freebsd

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hard-drive

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ddos

The situation: I have a server, on which we have 2-3 projects. Starting not long ago, the server started hanging up (We could not connect to it by ssh, and the connected clients had to wait 20 minutes for top to give results)

Early today I managed to execute gstat while it was in this state and saw, that it stays on 100% on da0, da0s1 and da0s1f. I dont quite know what those ids meen, but I understand that some processes just kill the HD by bombing it down with requests.

I ask of some propositions. I dont know how to find the culpit and can't prevent this.

I have freebsd on server.

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