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4 commits

Author SHA1 Message Date
Chris Marchbanks b40cc43958 Provide option to compress WAL records (#609) 
In running Prometheus instances, compressing the records was shown to
reduce disk usage by half while incurring a negligible CPU cost.

Signed-off-by: Chris Marchbanks <csmarchbanks@gmail.com>
 2019-06-19 16:46:24 +03:00
Frederic Branczyk e708ba1d14
wal: Add _total suffix as metric is a counter 
Signed-off-by: Frederic Branczyk <fbranczyk@gmail.com>
 2019-06-05 09:24:25 +02:00
Frederic Branczyk abd15845e2
wal: Replace promauto with injected registry 
Signed-off-by: Frederic Branczyk <fbranczyk@gmail.com>
 2019-06-03 12:29:52 +02:00
Tom Wilkie 77d5a7d47a
LiveReader can get into an infinite loop on corrupt WALs. (#524) 
Make WAL live tailer return EOF when the there is a half-written record at the end of the file.

Previously, this would cause an infinite loop as we ignored EOFs when filling the buffer.  We now differentiate between EOFs that read >0 bytes, and EOFs that didn't.

Add some more unit tests for tailing a corrupt WAL, and unify interfaces Reader and LiveReader for the purposes of testing.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
 2019-02-19 14:33:57 +00:00