From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dan Mick <dan.mick@inktank.com>
Subject: Re: ceph mkfs failed
Date: Thu, 07 Feb 2013 14:21:46 -0800
Message-ID: <511428FA.3040209@inktank.com>
References: <CAB7xdi=5q-e7FEXjrf524as4FPW-pM4z9wDrCm7boPVTr7sVLg@mail.gmail.com> <51140CFF.8000207@inktank.com> <CAB7xdimctzpk8qeRLJqxxeNRJEFpc2EpVHd37qj0E-OCeBP13A@mail.gmail.com> <CAPYLRzjeNZn+aYwtcij0YddYX=Fpd=xY5+QrveaNNMXCL4bLUw@mail.gmail.com> <CAB7xdin+Ow_KE1EgNSK6PG4EDSKgO=DSjFJBpBVKjL-Rd5wehA@mail.gmail.com>
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To: sheng qiu <herbert1984106@gmail.com>
Cc: Gregory Farnum <greg@inktank.com>, ceph-devel <ceph-devel@vger.kernel.org>

leveldb is required.  What filesystem are you using that doesn't support 
mmap?

On 02/07/2013 02:11 PM, sheng qiu wrote:
> Is it possible comment the leveldb setup codes during mkfs call path?
> i find the problem is because i am trying to use a bunch of memory as
> the OSD, when the leveldb mmap() the file on OSD, it failed, as the
> file actually located on memory.
>
> Thanks,
> Sheng
>
> On Thu, Feb 7, 2013 at 2:53 PM, Gregory Farnum <greg@inktank.com> wrote:
>> On Thu, Feb 7, 2013 at 12:42 PM, sheng qiu <herbert1984106@gmail.com> wrote:
>>> Hi Dan,
>>>
>>> thanks for your reply.
>>>
>>> after some code tracking, i found it failed at this point :
>>> in file leveldb/db/db_impl.cc  --> NewDB()
>>>
>>> log::Writer log(file);
>>>      std::string record;
>>>      new_db.EncodeTo(&record);
>>>      s = log.AddRecord(record);
>>>      if (s.ok()) {
>>>        fprintf(test, "NewDB: 2\n");
>>>        s = file->Close();
>>>      }else
>>>        fprintf(test, "NewDB: 2.5\n");
>>>
>>> the log.AddRecord return s which is not ok().
>>>
>>> can you provide some hint why it fails?  i am reading the AddRecord()
>>> function now.
>>
>> LevelDB is a generic library which we don't develop. My understanding
>> is that it's expected to work on any POSIX-compliant filesystem, but
>> you can check out the docs
>> (http://leveldb.googlecode.com/svn/trunk/doc/index.html) or source
>> code for more info.
>> -Greg
>
>
>