The Problem Is Somewhere Else

I was copying a few* files on the new mu.nu server and it was running a little slower than expected, so I stopped the copy and ran a quick performance test using hdparm.

And I was all, damn, there's something wrong here, it's only doing about 6MB a second.  (I'd expect to see upwards of 40MB a second on any modern 3.5" drive.)

So I checked one of the mee.nu servers, and I got the same disappointing results.

And then I looked again, and I realised...  Those numbers aren't in MB.  They're the next larger unit.

I was looking at the cached (not raw) performance, and yes, I'm getting 6GB per second from the cache.

Unfortunately, that still doesn't explain why the copy is so slow.

Answer: Ah.  If I'm copying archives from both the old servers to the new servers and uncompressing them on the fly, copying files from one disk to the other on the server at the same time is unlikely to deliver 100% of the system's potential.

* A few = slightly less than a million.

Posted by: Pixy Misa at 02:31 AM | Comments (4) | Add Comment | Trackbacks (Suck)
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