From: Gregory Farnum <gfarnum@redhat.com>
To: Igor Fedotov <ifedotov@mirantis.com>
Cc: Sage Weil <sage@newdream.net>, ceph-devel <ceph-devel@vger.kernel.org>
Subject: Re: uint32_t BlueStore::Extent::logical_offset?
Date: Tue, 22 Nov 2016 12:06:03 -0500 [thread overview]
Message-ID: <CAJ4mKGZ8=fikstiyfN_K23n=rBqRx8h-Umri7UOwhM6mfhNe-Q@mail.gmail.com> (raw)
In-Reply-To: <8e0b5262-32ef-02a6-6812-a3e82369e9aa@mirantis.com>
On Tue, Nov 22, 2016 at 11:58 AM, Igor Fedotov <ifedotov@mirantis.com> wrote:
> Hi Sage,
>
>
> I'm wondering why BlueStore::Extent::logical_offset is 32-bit wide.
>
> IMHO it's to be uint64_t unless we limit onode size to 4Gb.
>
> Looks like we have implicit truncate when doing set_lextent/new Extent at
> the moment and hence some issues with large onodes are possible.
onodes represent a single RADOS object within BlueStore, don't they?
So 4GB is much more than we need; the rest of the system on top is
going to fail well before you reach that size.
-Greg
>
> Thanks,
> Igor
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next prev parent reply other threads:[~2016-11-22 17:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-22 16:58 uint32_t BlueStore::Extent::logical_offset? Igor Fedotov
2016-11-22 17:06 ` Gregory Farnum [this message]
2016-11-22 17:15 ` Igor Fedotov
2016-11-22 21:47 ` Sage Weil
2016-11-22 21:53 ` Somnath Roy
2016-11-22 22:42 ` Matt Benjamin
2016-11-22 22:45 ` Sage Weil
2016-11-22 23:02 ` Matt Benjamin
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