Revision as of 18:50, 30 August 2014 edit Optikos (talk \| contribs) Extended confirmed users 3,027 edits →Other applications of copy-on-write: citation needed for C++11 inhibiting CoW ← Previous edit		Revision as of 15:05, 9 September 2014 edit undo 166.67.66.5 (talk) →Copy-on-write in storage media: added ZFS Next edit →
Line 13: == Copy-on-write in storage media == COW may also be used as the underlying mechanism for disk storage [[Snapshot (computer storage)\|snapshots]] such as those provided by [[logical volume management]], Microsoft [[Shadow Copy\|Volume Shadow Copy Service]] or file systems such as [[btrfs]] in [[Linux]], and [[ZFS]] on [[Solaris 10]], [[Solaris 11]], [[Illumos]], [[OmniOS]], [[FreeBSD] and [[Linux]]. Copy-on-write is also used in maintenance of instant snapshot on database servers like Microsoft SQL Server 2005. Instant snapshots preserve a static view of a database by storing a pre-modification copy of data when underlying data are updated. Instant snapshots are used for testing uses or moment-dependent reports and should not be used to replace backups. On the other hand, snapshots enable database back-ups in a consistent state without taking them offline.

Copy-on-write: Difference between revisions