swift team mailing list archive

["woorung" <woorung@xxxxxxxxx>]

Adrian, 

 

That’s what I try to look for.

The post is helpful enough to understand Swift.

 

By my short review, Swift seems like some fully distributed key-value
storages such as Cassandra, CouchDB, MongoDB based on DHT.

The key would be a filename, or a filename concatenating directory name for
hierarchy.

The value would be a file content as blob type.

The target of replication must be a file content itself.

So if the size of file is getting bigger, the frequent changes in the file
will make too many big file copies due to immutable feature although it
uses eventual consistency.

 

Thank you Adrian.

 

 

==================================

Alex Woohyun Kim

The creator of open source "Coord" for cloud computing

(http://www.coordguru.com)

 

From: swift-bounces+woorung=gmail.com@xxxxxxxxxxxxxxxxxxx [mailto:swift-
bounces+woorung=gmail.com@xxxxxxxxxxxxxxxxxxx] On Behalf Of Adrian Otto
Sent: Thursday, September 02, 2010 3:50 AM
To: swift@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Swift] Relation of Swift and Filesystem

 

Alex,

 

This post may offer you more insight: 

 

http://adrianotto.com/2010/09/openstack-os-is-great-for/

 

Adrian

 

On Sep 1, 2010, at 7:43 AM, Chuck Thier wrote:





Hi Alex,

 

Swift is designed to be used for generic blob storage with a RESTful API.
It is not designed to do block storage and thusly doesn't provide a file
system like interface.  Swift is implemented on top of local file systems
(like XFS) and the objects, and metadata are distributed equally across the
cluster.  This design does not require a CFS to be used for the storage of
files. 

 

Feel free to let me know if you have any further questions.

 

--

Chuck

2010/8/31 woorung <woorung@xxxxxxxxx>

Swift seems like providing virtual block pool similar to ZFS.

So it may be able to be worked on any existing filesystems such as ext3 and
XFS.

I think that it is not a kind of CFS(Cluster File System), so the
filesystem with Swift is just local filesystem.

The local filesystem won’t share any blocks(or objects) with any
filesystems made by other users as far as Swift does not use CFS like GFS
or GlusterFS.

In the low level of block or object, Swift will be good to provide
availability, replication, and something like that across racks in
datacenter.

But in the high level such as filesystem, I think that CFS-like filesystem
is needed to leverage Swift’s advantages.

Is there any idea?

 

 

 

==================================

Alex Woohyun Kim

The creator of open source "Coord" for cloud computing

(http://www.coordguru.com <http://www.coordguru.com/> )

 


_______________________________________________
Mailing list: https://launchpad.net/~swift
Post to     : swift@xxxxxxxxxxxxxxxxxxx
Unsubscribe : https://launchpad.net/~swift
More help   : https://help.launchpad.net/ListHelp

 

_______________________________________________
Mailing list: https://launchpad.net/~swift
Post to     : swift@xxxxxxxxxxxxxxxxxxx
Unsubscribe : https://launchpad.net/~swift
More help   : https://help.launchpad.net/ListHelp