I want to know what applications are idempotent or not idempotent? and
Why? Could you give me a example.
Thank you
2012/10/29 Ted Dunning tdunn...@maprtech.com
Create cannot be idempotent because of the problem of watches and
sequential files.
Similarly, mkdirs, rename and delete cannot
On 4 November 2012 17:25, lei liu liulei...@gmail.com wrote:
I want to know what applications are idempotent or not idempotent? and
Why? Could you give me a example.
When you say idempotent, I presume you mean the operation happens
at-most-once; ignoring the degenerate case where all
Hi Steve，
Thank you for your detailed and patiently answered. I understand that.
2012/11/5 Steve Loughran ste...@hortonworks.com
On 4 November 2012 17:25, lei liu liulei...@gmail.com wrote:
I want to know what applications are idempotent or not idempotent? and
Why? Could you give me a
I think these methods should are idempotent, these methods should be repeated
calls to be harmless by same client.
Thanks,
LiuLei
Create cannot be idempotent because of the problem of watches and
sequential files.
Similarly, mkdirs, rename and delete cannot generally be idempotent. In
particular applications, you might find it is OK to treat them as such, but
there are definitely applications where they are not idempotent.
Thanks Ted for your reply.
What is the the problem of watches and sequential files? If you can
describe in detail, I can better understand the problem.
2012/10/29 Ted Dunning tdunn...@maprtech.com
Create cannot be idempotent because of the problem of watches and
sequential files.
Create cannot be idempotent with sequential files. Doing the same create
twice creates two different files.
On Sun, Oct 28, 2012 at 10:25 PM, lei liu liulei...@gmail.com wrote:
Thanks Ted for your reply.
What is the the problem of watches and sequential files? If you can
describe in
