Re: [squid-users] RAID is good

On Thu, Mar 27, 2008, Neil Harkins wrote:

> As for Squid handling a JBOD single disk failure,
> not stacking up more reads on an (assumed) failed
> disk would be great, but the process still needs to
> be killed to get rid of those that blocked before it
> noticed and to replace the disk, right?

There's a few things to do here:

* fail existing requests and new requests!
* mark the cachedir as down; stop any hits from that cachedir
* (delete the StoreEntry records for that particular FS)
* modify the rebuild logic to handle rebuilding a single FS when
  it comes online!
* (And if possible - make the rebuild logic for ufs/aufs/diskd
  use the async operators instead of the sync operators)

Ideally the index should be pushed into per-storedir (so the whole
index can be removed all at once!) or place the StoreEntry entries
in a linked list per storedir - both of which are to avoid walking
the whole tree just to delete the entries for one storedir.

Adrian

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