Re: [Moosefs-users] changelogs on the metalogger

[Bán M. <ba...@vo...>]

On Mon, 6 Sep 2010 13:42:30 +0200
Michał Borychowski <mic...@ge...> wrote:

> Hi!
> 
> Metaloggers should continuously receive the current changes from the
> master server and write them into its own text change logs named
> changelog_ml.0.mfs. 
> 
> How do you know that in your system they are save hourly? Don't they
> increment with every change in the filesystem?

Yes, exactly. There is no new lines on metalogger server's
changelog_ml.0.mfs, while the master's changelog.0.mfs updating.
Nevertheless the sessions_ml.mfs is updating continuously.
My server version is 1.6.7 and it is running on Ubuntu Jaunty.

Here is a short log part from a metalogger:
Sep  6 14:02:00 fekete mfsmetalogger[30553]: sessions downloaded
2374B/0.000435s (5.457 MB/s) Sep  6 14:02:02 fekete
mfschunkserver[30562]: testing
chunk: /mnt/mfs_hd1/09/chunk_0000000000000009_00000001.mfs Sep  6
14:02:12 fekete mfschunkserver[30562]: testing
chunk: /mnt/mfs_hd1/0C/chunk_000000000000000C_00000001.mfs Sep  6
14:02:22 fekete mfschunkserver[30562]: testing
chunk: /mnt/mfs_hd1/0E/chunk_000000000000000E_00000001.mfs Sep  6
14:02:32 fekete mfschunkserver[30562]: testing
chunk: /mnt/mfs_hd1/10/chunk_0000000000000010_00000001.mfs Sep  6
14:02:42 fekete mfschunkserver[30562]: testing
chunk: /mnt/mfs_hd1/0A/chunk_000000000000000A_00000001.mfs Sep  6
14:02:52 fekete mfschunkserver[30562]: testing
chunk: /mnt/mfs_hd1/0F/chunk_000000000000000F_00000001.mfs Sep  6
14:03:00 fekete mfsmetalogger[30553]: sessions downloaded
2374B/0.000570s (4.165 MB/s)


> 
> Regarding your second question - yes, this is right. For now,
> metalogger doesn't download the metadata file upon starting. We know
> about this shortcoming and we'll fix the behaviour soon.
> 
> 

Thanx.

&Miklos