Comments (4)
Thanks for mentioning this. I agree that some more clarification can be made around this topic. I also look forward to providing optional fsync policies of Always
, EverySecond
, and Never
.
Salvatore Sanfilippo talks about the same thing. http://redis.io/topics/persistence#how-durable-is-the-append-only-file
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I updated the README and added a SyncPolicy
which can be set to Always
for fsyncing after every write. b4e23eb
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Redis is awful database to learn from. Just keep it in mind. It did almost all wrong internally. Single thing it did well is user API.
You may batch and pipeline fsync requests:
- several request made within 1ms are batched, written and fsync request is sent. Batch waits on this particular fsync to return. (you may consider using Future: https://godoc.org/github.com/Workiva/go-datastructures/futures#Selectable )
- next batch will sent next fsync request without waiting for previous batch to return. Modern Linux systems performs well this way.
Combining batching with pipelining you may reach acceptable throughput without sacrificing durability.
Of course, it will not as fast as fsyncing once a second, and it will have large latency.
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Very helpful information. Thank you for sharing with me. I'm starting to lean towards setting the sync policy to Always by default. Then the user can choose what's best for their application, even turning it off altogether.
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Related Issues (20)
- Python bindings
- Enhancement: add new method GetWithTTL to return value together with TTL
- What happens if two funcs write to the db at the exact same time? HOT 1
- Get size of db on disk
- Does the data.db file support rewrite like redis AOF? HOT 2
- Dependencies update due?
- Feature Request: Delete inside iterator
- Question: cost/benefit of supporting generic types; and persisting secondary indexes
- Is it necessary to (defer) db.Close()?
- Expiry works only during runtime and is lost on shrink HOT 6
- Feat: Add DescendGreaterOrEqual for the range [last, pivot], and also DescendRange with option (lt, gte]
- tx.Ascend doesn't work correctly HOT 1
- Does buntdb needs Go 1.18+ due to btree dependency? HOT 1
- Question: What is the format of .db file? HOT 1
- I wonder if we can find closest lat long for a given latlon from spatial index using nearby
- [Feature Request] Is there a way to limit memroy usage?
- Is there any plan to support index on MessagePack? HOT 1
- How to renew the ttl?
- Question: Is buntdb goroutine-safe? HOT 1
- Will "group by" be supported in this lib?
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