Our workaround is to switch to i2's. Amazon didn't mention anything, though we're getting on a call with them soon so I'll be sure to ask. Fwiw, we're also on 12.04.

Wes


Daniel Nelson <mailto:daniel.nel...@vungle.com>
June 2, 2015 at 2:42 PM

Do you have any workarounds for the d2 issues? We’ve been using them for our Kafkas too, and ran into the instability. We’re on Ubuntu 12.04 and plan to try on 14.04 with the latest HWE to see if that helps any.

Thanks!
Wes Chow <mailto:w...@chartbeat.com>
June 2, 2015 at 1:39 PM

We have run d2 instances with Kafka. They're currently unstable -- Amazon confirmed a host issue with d2 instances that gets tickled by a Kafka workload yesterday. Otherwise, it seems the d2 instance type is ideal as it gets an enormous amount of disk throughput and you'll likely be network bottlenecked.

Wes


Henry Cai <mailto:h...@pinterest.com.INVALID>
June 2, 2015 at 12:37 PM
We have been hosting kafka brokers in Amazon EC2 and we are using EBS
disk. But periodically we were hit by long I/O wait time on EBS in some
Availability Zones.

We are thinking to change the instance types to a local HDD or local SSD.
HDD is cheaper and bigger and seems quite fit for the Kafka use case which
is mostly sequential read/write, but some early experiments show the HDD
cannot catch up with the message producing speed since there are many
topic/partitions on the broker which actually makes the disk I/O more
randomly accessed.

How are people's experience of choosing disk types on Amazon?

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