/dev/sdp is an EBS volume. /dev/sdb is a native volume.
This is a large instance.
r...@domu-<mumble>#:~# hdparm -tT /dev/sdp
Timing cached reads: 1634 MB in 2.00 seconds = 817.30 MB/sec
Timing buffered disk reads: 160 MB in 3.00 seconds = 53.27 MB/sec
r...@domu-<mumble>:~# hdparm -tT /dev/sdb
Timing cached reads: 1658 MB in 2.00 seconds = 829.44 MB/sec
Timing buffered disk reads: 242 MB in 3.00 seconds = 80.56 MB/sec
r...@domu-<mumble>:~# time dd if=/dev/urandom bs=512000 of=/tmp/memtest
1050+0 records in
1050+0 records out
537600000 bytes (538 MB) copied, 106.525 s, 5.0 MB/s
r...@domu-<mumble>:~# time md5sum /tmp/memtest; time md5sum /tmp/memtest;
time md5sum /tmp/memtest
On Mon, Nov 9, 2009 at 4:54 PM, Patrick Hunt <ph...@apache.org> wrote:
> I'm really interested to know how ec2 compares wrt disk and network
> performance to what I've documented here under the "hardware" section:
> Is it possible for someone to compare the network and disk performance
> (scp, dd, md5sum, etc...) that I document in the wiki page on say, EC2
> small/large nodes? I'd do it myself but I've not used ec2. If anyone could
> try these and report I'd appreciate it.
> Ted Dunning wrote:
>> Worked pretty well for me. We did extend all of our timeouts. The
>> worry for us was timeouts on the client side. The ZK server side was no
>> problem in that respect.
>> On Mon, Nov 9, 2009 at 4:20 PM, Jun Rao <jun...@almaden.ibm.com> wrote:
>> Has anyone deployed ZK on EC2? What's the experience there? Are there
>>> timeouts, lead re-election, etc? Thanks,
>>> IBM Almaden Research Center
>>> K55/B1, 650 Harry Road, San Jose, CA 95120-6099
Ted Dunning, CTO