On 10/18/2012 10:30 AM, Corey Kovacs wrote: > Jeff that came from one of you core glusterfs engineers (sid?). According to > him the term stripe isn't used correctly and does not imply parallel > operations. Well, not to pull rank or undermine a colleague, but I don't think Sid knows the code like I do. Go look at stripe_writev if you want to see how it will issue multiple requests within a loop xlators/cluster/stripe/src/stripe.c:3754 before waiting for any to return. You can even use gdb to step through it if you still don't believe me. > Writes are handled one brick at a time. If a stripe were parallel > tje my 800 Mbs should have been closer to 2GB across three servers each capable > of 900 MB/s all day long. I agree on "should" but there are other explanations besides lack of parallelism. Please note that diverting people to the wrong place keeps them from fixing anything in the right place.
