diff options
Diffstat (limited to 'release')
| -rw-r--r-- | release/doc/en_US.ISO8859-1/relnotes/article.xml | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/release/doc/en_US.ISO8859-1/relnotes/article.xml b/release/doc/en_US.ISO8859-1/relnotes/article.xml index a309e51..05ca69e 100644 --- a/release/doc/en_US.ISO8859-1/relnotes/article.xml +++ b/release/doc/en_US.ISO8859-1/relnotes/article.xml @@ -342,6 +342,14 @@ <para revision="252140">Support for L2ARC compression has been added to ZFS.</para> + <para revision="243524">The zio nop-write improvement from Illumos + was imported into &os;. To reduce I/O, nop-write skips overwriting + data if the checksum (cryptographically secure) of new data + matches the checksum of existing data. It also saves space if + snapshots are in use. This improvement only works only on + datasets with enabled compression, disabled deduplication and + sha256 checksums.</para> + <para>ZFS will now compare the checksums of incoming writes to the checksum of the existing on-disk data and avoid issuing any write I/O for data that has not changed. This will reduce I/O |
