Understanding ZFS Snapshots - why will it utilize space ? Post: 303013443

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Operating Systems Solaris Understanding ZFS Snapshots - why will it utilize space ? Post 303013443 by javanoob on Wednesday 21st of February 2018 11:58:55 AM

02-21-2018

Registered User

Hi Peasant,

Thanks for your reply.
Can I look at it this way ->

1) When file1 is deleted, there is actually no change done; just that snap1 and snap2 will still need to refer to this deleted file; hence USED for snap1 and snap2 remain the same, and USSSNAP will reflect 100M (because that the filesize of file1)

2) when snap1 is deleted, the only snap that still needs to refer to "deleted file1" is snap2. hence, snap2 is "holding on/USED" to 100M of the zpool and if snap2 is deleted, file1's space is 100% freed

am I right ?

javanoob

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lzcmp

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and  xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp or diff.  If only one file is specified, then the files compared are file1 (which must have a suffix of	a  supported  com-
       pression  format)  and  file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp or diff is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2009-07-05								 XZDIFF(1)