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Author SHA1 Message Date
beorn7 5d3cd65a5d Improve performance of ingestion. 
- Parallelize AppendSamples as much as possible without breaking the
  contract about temporal order.

- Allocate more fingerprint locker slots.

- Do not run early checkpoints if we are behind on chunk persistence.

- Increase fpMinWaitDuration to give the disk more time for more
  important things.

Also, switch math.MaxInt64 and math.MinInt64 to the new constants.
 2015-02-12 18:12:37 +01:00
Bjoern Rabenstein 3948e2a7f8 Move lost files to an "orphaned" directory. 
Previously, those were simply deleted. The orphaned files can now be
used for forensics if needed.
 2015-01-29 14:52:12 +01:00
Bjoern Rabenstein c24bfdf701 Move crash related code into separate file. 
persistence.go is way too long anyway, and a lot of code is just crash
recovery, which is not important to understand the normal operation.

Also, remove unused `exists` function.
 2015-01-29 13:13:16 +01:00