I have just provisioned a dedicated server on singlehop.
I'm running it through some tests to know what to expect performance-wise. On the I/O side (with 4 1TB disks in RAID 10) I get:
write-cache disabled 200 MB/s read throughput 30 MB/s write throughput
I thought that was really low compared to my desktop HD which gets 150-150 or so. So I had a chat with them and they suggested enabling the write cache. New results:
write-cache enabled 280 MB/s read 260 MB/s write
which is great and all but means I'd have to add a BBU for an additional monthly cost.
Is it normal for the write throughput to be 1/4 of a regular drive on RAID10, if you don't have write cache? It almost feels like its intentionally bad to force you to pony up for the BBU. I'd be happy with normal non-raid performance of 150/150.
UPDATE: They're have a look at it now and seeing whether there is something wrong. I'm gonna give ahamat the accepted answer as he broke down when this 8x drop-off would affect the server workload and when it would not. Will update again if I get any more data. +1 for other answers. Thanks.
UPDATE2: There was something wrong with the hardware it seems. Moved to a new machine with identical specs and getting 80MB/s writes without write-back cache. 250MB/s with the cache on. so 3x drop-off and reasonable throughput without it.