: snapshot. This technique has these advantages: Can keep multiple : snapshots on each host without the need to keep multiple copies of : index files that have not changed. File copying from master to slave
: Why do hard links make file copying between master and slave fast? : Thanks. Best Regards. bullets 2 and 3 build off of bullet 1 ... the Lucene file format is desigend such that files are only ever added, appended to, or deleted -- there is never in rewriting of existing bytes in a file. so having hardlinks to the orriginal files in the snapshot directories on both the master/slave means that the rsync operation of a new snapshot only needs to send the new data, not diffs or full contents of existing files. -Hoss
