Zope-Announce

zope-announce@zope.dev

August 2002

26 participants
32 discussions

ANNOUNCE: Pound - reverse proxy and load balancer - v0.8
by Robert Segall 01 Aug '02

01 Aug '02

This is to announce the release of Pound v0.8. This release is mostly about bug fixes. Unless some new suggestions come in, the feature set seems to be rather complete at this point. Changes from previous version: - fixed a serious problem: Pound now is able to detect back-end connections that have timed out (closed by the server) and re-open them if necessary. Previous versions would return a "500 Server error" and log "can't read from xxx" in such cases. This issue was mostly apparent with newer versions of Apache that set time limits on connection times. - fixed the request pattern matching as per the RFCs (all allowed character classes). - fixed a problem with the handling of "HEAD" type requests. - fixed an issue with conflicts between SSL and multi-threading. - added a header indicating the origin of the request (X-Forwarded-For) - added the possibility to pass SSL certificate information in headers. What is Pound (from the Web page) - a reverse-proxy: it passes requests from client browsers to one or more back-end servers. - a load balancer: it will distribute the requests from the client browsers among several back-end servers, while keeping session information. - an SSL wrapper: Pound will decrypt HTTPS requests from client browsers and pass them as plain HTTP to the back-end browsers. - an HTTP/HTTPS sanitizer: Pound will verify requests for correctness and accept only well-formed ones. - an HTTP/1.1 to 1.0 proxy. - a fail-over-server: should a back-end server fail, Pound will take note of the fact and stop passing requests to it until it recovers. - a request redirector - it will pass client requests to separate groups of servers, based on required URL (pattern matching) For further information, download, etc. please see http://www.apsis.ch/pound The software is at version 0.8 (beta quality). Further testing (especially under heavy loads), improvements and suggestions are welcome. Pound is distributed under the GPL. Enjoy and let me know how it works for you. -- Robert Segall Apsis GmbH Postfach, Uetikon am See, CH-8707 Tel: +41-1-920 4904

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Announcement: DirectoryStorage 1.0 alpha 1
by Toby Dickenson 01 Aug '02

01 Aug '02

Announcing the first alpha release of DirectoryStorage, a ZODB Storage which uses one file per revision of an object. * A very simple file format. Your data is not locked away inside an unfamiliar, opaque database. * Easy administration. Nearly as easy as FileStorage, and much less touble than BerkeleyStorage. * Use familiar filesystem tools for maintaining the database. For example: * Take an incremental backup using tar. * Make crucial persistent objects immutable using file permissions * Constant memory usage, even during packing. With the right filesystem I believe this makes DirectoryStorage the most scalable Storage available today. Changes since the previous informal release include: * Many bug fixes. DirectoryStorage is now in production use. * A storage checking tool. Detect any problems early. * Additional fault tolerance to reduce the risk of permanent data loss. * Many performance improvements - now within 50% of FileStorage. If you like the idea of a scalable high performance storage with easy administration, but dont yet want to put your data in alpha-quality software, why not join the dirstorage-users mailing list at http://lists.sourceforge.net/lists/listinfo/dirstorage-users

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