Re: compressed volumes στο linux

[ndemou at gmail.com]

1) σχετικά με τις απαντήσεις στο "γιατί το linux δεν έχει δημοφιλή
υλοποίηση compressed filesystem":
       Ναι είναι δύσκολο και ναι έχει το κόστος του (σε code
complexity και CPU usage) αλλά είναι απολύτως εφικτό. Δεν πιστεύω ότι
οι τεχνικές δυσκολίες είναι ο λόγος (έχουμε δει πιο θαυμαστά πράγματα
να υλοποιούνται σε χρόνους αστραπή).

2) σχετικά με άλλες πιθανότητες για compressed fs κάτω απο linux: μετά
το google έριξα μια ματιά και στην wikipedia και είχε αρκετό
ενδιαφέρον:

ZFS
====
ZFS is a file system originally created by Sun Microsystems for the
Solaris Operating System. The features of ZFS include high storage
capacity, integration of the concepts of filesystem and volume
management, a novel on-disk structure, lightweight instances, and easy
storage pool management. ZFS is implemented as open-source software,
licensed under the Common Development and Distribution License (CDDL).

Supported operating systems: [...] Linux via FUSE

Reiser4
========
Flexible plugin infrastructure (through which special metadata types,
encryption and compression will be supported) [...]supports
transparent compression and encryption with the cryptcompress plugin
which is the default file handler in version 4.1.

As of 2007, Reiser4 has not yet been merged into the mainline Linux
kernel and consequently is still not supported on many Linux
distributions; however, its predecessor ReiserFS v3 has been much more
widely adopted. Reiser4 is also available from Andrew Morton's -mm
kernel sources. Linux kernel developers claim that Reiser4 breaks
Linux coding standards,[2] but Hans Reiser suggests political reasons.

NSS
====
Novell Storage Services (NSS) is a file system used by the Novell
NetWare operating system and recently ported to SUSE Linux. It has
some unique features that make it especially useful for, but not
limited to, setting up shared volumes on a file server in a Local Area
Network.