Thank you very much for the information. We are very curious if they
decide to choose MooseFS. Now it is even better with the cache mechanism

很感谢你（我自己了）提供的信息。如果他们能选择moosefs，我感到非常惊喜。不过目前，MFS有了更棒的缓存机制。

If they need any support we are open to help.

如果他们需要任何支持，我们很乐意效劳

Chinese site would also be quite important I think.

中文网站的建设也是我们重点考虑的了。
Regards
Michal

> Thast’s all right.
> At present China has some portals such as www.sina.com, are actively
trying to moosefs. I intend to collect relevant data or information, to see
whether the moosefs the Chinese site to be established
>

We are pleased to announce the latest stable release of MooseFS 1.6.17.

We introduced here quite an important feature which is the automatic data
cache management. This should give noticeable performance increase in most
environments.

Requirements for the master server, chunk servers and clients

MASTER

As the managing server (master) is a crucial element of MooseFS, it should be installed on a machine which guarantees high stability and access requirements which are adequate for the whole system. It is advisable to use a server with a redundant power supply, ECC memory, and disk array RAID1/RAID5/RAID10. The managing server OS has to be POSIX compliant (systems verified so far: Linux, FreeBSD, Mac OS X and OpenSolaris).

The most important factor in the master machine is RAM, as the full file system structure is cached in RAM for speed. The master server should have approximately 300 MiB of RAM allocated to handle 1 million files on chunkservers.

The necessary size of HDD depends both on the number of files and chunks used (main metadata file) and on the number of operations made on the files (metadata changelog); for example the space of 20GiB is enough for storing information for 25 million files and for changelogs to be kept for up to 50 hours.

METALOGGER

MooseFS metalogger just gathers metadata backups from the MooseFS master server – so the hardware requirements are not higher than for the master server itself; it needs about the same disk space. Similarly to the master server – the OS has to be POSIX compliant (Linux, FreeBSD, Mac OS X, OpenSolaris, etc.)

If you would like to use the metalogger as a master server in case of its failure, the metalogger machine should have at least the same amount of RAM and HDD as the main master server.

CHUNKSERVERS

Chunkserver machines should have appropriate disk space (dedicated exclusively for MooseFS) and POSIX compliant OS (verified so far: Linux, FreeBSD, Mac OS X and OpenSolaris).

Minimal configuration should start from several gigabytes of storage space (only disks with more than 256 MB and chunkservers reporting more than 1 GB of total free space are accessible for new data).
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