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Author SHA1 Message Date
Julius Volz 630b5a087a Also consider on-disk fingerprints during purge. 
This reintroduces LevelDB iterators so that we can iterate through all
the on-disk fingerprints.

Change-Id: I007ee4638d038d2a4461bbda27f30fcaad411474
 2014-11-25 17:07:35 +01:00
Bjoern Rabenstein f5f9f3514a Major code cleanup. 
- Make it go-vet and golint clean.
- Add comments, TODOs, etc.

Change-Id: If1392d96f3d5b4cdde597b10c8dff1769fcfabe2
 2014-11-25 17:02:53 +01:00
Bjoern Rabenstein 3592dc2359 Implement series eviction. 
Change-Id: I7a503e0ba78aae3761d032851b06f2807122b085
 2014-11-25 17:02:52 +01:00
Bjoern Rabenstein bbf49200ab Implement methods in persistence.go. 
Change-Id: I804cdd0b30420e171825fd86fe1281eca0d5e638
 2014-11-25 17:02:23 +01:00
Bjoern Rabenstein 5a128a04a9 Major reorganization of the storage. 
Most important, the heads file will now persist all the chunk descs,
too. Implicitly, it will serve as the persisted form of the
fp-to-series map.

Change-Id: Ic867e78f2714d54c3b5733939cc5aef43f7bd08d
 2014-11-25 17:02:01 +01:00
Bjoern Rabenstein e7cb9ddb9f Use a sync.pool for the staging buffer in codec.go. 
Change-Id: I1aae6847f77b5a7c75582b07c199b1943cf90552
 2014-11-25 17:02:01 +01:00
Bjoern Rabenstein 4770cf76a4 Make index package more self-contained. 
Moved interna from diskPersistence into the indexer.
TotalIndexer now called diskIndexer.

Change-Id: I6c8c62cb171f12bbd8a5474773af7786d71ba388
 2014-11-25 17:02:01 +01:00
Bjoern Rabenstein 89f10e8eb2 Move to using the standard library interfaces for encoding/decoding. 
BinaryMarshaler instead of encodable.
BinaryUnmarshaler instead of decodable.

Left 'codable' in place for lack of a better word.

Change-Id: I8a104be7d6db916e8dbc47ff95e6ff73b845ac22
 2014-11-25 17:02:01 +01:00
Bjoern Rabenstein af77d5ef0b Added a few missing implementations in index.go. 
Also, added closing of persistence and mem storage.

Change-Id: Iacf0d22c3520dd2584d9546984c1f8a5ed6cd54e
 2014-11-25 17:02:01 +01:00
Julius Volz cca7ebe906 Some more cleanups / obsolete code removals. 
Change-Id: I584144ceeeedafdb114266d8a6d2513e67b1d010
 2014-11-25 17:02:00 +01:00
Julius Volz 7e85711df0 Beginnings of a tiered index implementation. 
This reintroduces a LevelDB-based metrics index.

Change-Id: I4111540301c52255a07b2f570761707a32f72c05
 2014-11-25 17:02:00 +01:00
Julius Volz 8dfaa5ecd2 Remove use of freelists for chunk bufs. 
Change-Id: Ib887fdb61e1d96da0cd32545817b925ba88831c1
 2014-11-25 17:02:00 +01:00
Julius Volz 7b35e0f0b8 Use constants from math package instead of literals. 
Change-Id: I55427ba32c2cbb32ee42ec1e3153160965ab8b3c
 2014-11-25 17:02:00 +01:00
Julius Volz 15929eece2 Unpin any already loaded chunks upon preloading error. 
Change-Id: Ib451136e3ef21bce8b814c21b66eaab727ab341b
 2014-11-25 17:02:00 +01:00
Julius Volz fd01d07589 Check that chunk buffer length fits in 16 bit. 
Change-Id: Id086a54aa8a1990c1979e747c1c02e53bed6d447
 2014-11-25 17:02:00 +01:00
Bjoern Rabenstein 1ca7f24137 Remove float diff tolerance altogether. 
Change-Id: I9ea9683a4665d5800fca75560bb4b8a8b4406d55
 2014-11-25 17:02:00 +01:00
Bjoern Rabenstein d742edfe0d Fix precision loss. 
Large delta values often imply a difference between a large base value
and the large delta value, potentially resulting in small numbers with
a huge precision error. Since large delta values need 8 bytes anyway,
we are not even saving memory.

As a solution, always save the absoluto value rather than a delta once
8 bytes would be needed for the delta. Timestamps are then saved as 8
byte integers, while values are always saved as float64 in that case.

Change-Id: I01100d600515e16df58ce508b50982ffd762cc49
 2014-11-25 17:02:00 +01:00
Bjoern Rabenstein dc2e463a97 Improvements after review. 
Change-Id: I484359282d4c7113518bbbb131f4f18383c08fdb
 2014-11-25 17:02:00 +01:00
Bjoern Rabenstein 52c9dc43a3 Improve testing. 
In particular, create a fuzz test for time series.

Change-Id: I523a17912405a0b6b46bd395c781d201dfe55036
 2014-11-25 17:02:00 +01:00
Julius Volz 3b25867d61 Add chunk persistence tests, fix storage tests. 
Change-Id: Id0b8f5382e99efa839cc0f826e92bbda985fe9a9
 2014-11-25 17:02:00 +01:00
Bjoern Rabenstein ecdf5ab14f Index-persistence switched from gob to a hand-coded solution. 
Change-Id: Ib4ec42535bd08df16d34d4774bb638e35c5a1841
 2014-11-25 17:02:00 +01:00
Julius Volz e7ed39c9a6 Initial experimental snapshot of next-gen storage. 
Change-Id: Ifb8709960dbedd1d9f5efd88cdd359ee9fa9d26d
 2014-11-25 17:02:00 +01:00