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Re: [Gluster-devel] FUSE nodes TTL and FORGET
From: |
Raghavendra Gowdappa |
Subject: |
Re: [Gluster-devel] FUSE nodes TTL and FORGET |
Date: |
Mon, 18 Jun 2012 01:09:59 -0400 (EDT) |
----- Original Message -----
> From: "Emmanuel Dreyfus" <address@hidden>
> To: "Raghavendra Gowdappa" <address@hidden>
> Cc: address@hidden
> Sent: Monday, June 18, 2012 10:15:40 AM
> Subject: Re: [Gluster-devel] FUSE nodes TTL and FORGET
>
> Raghavendra Gowdappa <address@hidden> wrote:
>
> > I am little bit confused here about uselessness of FORGET messages
>
> Once a node TTL is expired, you will have to do a LOOKUP again, but
> if
> you can avoid doing a FORGET for a node you are going to lookup again
> immediatly, you save the cost of the FORGET operation. This is the
> rationale for postponing FORGET a bit, so that you have an
> opportunity
> to cancel it because the node is still being used.
Wouldn't tinkering with TTL value achieve similar functionality? Or is it that
a fixed TTL value is too static to predict next lookup?
>
> --
> Emmanuel Dreyfus
> http://hcpnet.free.fr/pubz
> address@hidden
>