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Re: After power reset, LMDB sub-DBs' key-pairs are missing
- To: Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de>
- Subject: Re: After power reset, LMDB sub-DBs' key-pairs are missing
- From: Arto Bendiken <arto@bendiken.net>
- Date: Tue, 15 Mar 2016 16:48:14 +0100
- Cc: OpenLDAP technical mailing list <openldap-technical@openldap.org>
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- References: <CAE7aNuS4=5ENrgL7w=zDqUe2dE7WH01nkAkAX76Msuw_uj=xug@mail.gmail.com> <56E7CF48020000A1000204CD@gwsmtp1.uni-regensburg.de>
Hi Ulrich,
On Tue, Mar 15, 2016 at 9:00 AM, Ulrich Windl
<Ulrich.Windl@rz.uni-regensburg.de> wrote:
>>>> Arto Bendiken <arto@bendiken.net> schrieb am 14.03.2016 um 17:30 in Nachricht
> <CAE7aNuS4=5ENrgL7w=zDqUe2dE7WH01nkAkAX76Msuw_uj=xug@mail.gmail.com>:
>> Here's a curious case that I had not encountered with LMDB as yet previously:
>>
>> 1. There was a power reset of a virtual machine with an active LMDB
>> writer process (standalone use, not OpenLDAP) on an LMDB file
>> containing three sub-DBs.
> [...]
>
> Hi!
>
> What is a "power reset of a virtual machine"? A virtual power reset (i.e. reset), or a power reset of the host?
> In the latter case some writes that the VM considers done may not be committed on the host, depending on the exact configuration. You didn't give any details on that, so I can only guess...
The latter, with the VM's virtio disks being LVM volumes assigned and
dedicated to it using libvirt--a run-of-the-mill configuration.
--
Arto Bendiken | @bendiken | http://ar.to