LevelDB: a fast and lightweight key/value database library

#1

Post by adulau » Sun, May 08, 2011, 3:20 PM UTC

LevelDB: a fast and lightweight key/value database library
code.google.com

Re: LevelDB: a fast and lightweight key/value database library

#2

Post by ma2rten » Sun, May 08, 2011, 4:05 PM UTC

Does someone have any idea, how the benchmark results compare to other databases (e.g. redis) ?

Re: LevelDB: a fast and lightweight key/value database library

#3

Post by rb2k_ » Sun, May 08, 2011, 4:19 PM UTC

ma2rten wrote: post #2

Does someone have any idea, how the benchmark results compare to other databases (e.g. redis) ?

It doesn't seem to have a network interface. It is somewhat comparable to InnoDB or Tokyo/Kyoto Cabinet

Re: LevelDB: a fast and lightweight key/value database library

#4

Post by mcorrientes » Sun, May 08, 2011, 4:25 PM UTC

Sounds like a possible redis or memcached replacement.

A performance comparision with memcached would be interesting.

Re: LevelDB: a fast and lightweight key/value database library

#5

Post by 18pfsmt » Sun, May 08, 2011, 4:28 PM UTC

It looks like this is a local storage tool, similar to sqlite. Is that correct? Lots of chromium devs on that list.

Re: LevelDB: a fast and lightweight key/value database library

#6

Post by leif » Sun, May 08, 2011, 4:28 PM UTC

Anybody know what hardware those benchmarks were on? Is it actually durable? They mention problems with writeback caching, but are they at least durable from the OS perspective? How well does it scale?

Re: LevelDB: a fast and lightweight key/value database library

#7

Post by latch » Sun, May 08, 2011, 4:28 PM UTC

mcorrientes wrote: post #4

Sounds like a possible redis or memcached replacement. A performance comparision with memcached would be interesting.

replacement is a strong word when you consider that you are talking about:

get/put/delete vs http://redis.io/commands

Re: LevelDB: a fast and lightweight key/value database library

#8

Post by latch » Sun, May 08, 2011, 4:29 PM UTC

leif wrote: post #6

Anybody know what hardware those benchmarks were on? Is it actually durable? They mention problems with writeback caching, but are they at least durable from the OS perspective? How well does it scale?

it says so on the page: CPU: 4 x Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz

Safe to assume the data fit into memory..whatever amount there was.

Re: LevelDB: a fast and lightweight key/value database library

#9

Post by mcorrientes » Sun, May 08, 2011, 4:33 PM UTC

latch wrote: post #7

mcorrientes wrote: post #4

Sounds like a possible redis or memcached replacement. A performance comparision with memcached would be interesting.

replacement is a strong word when you consider that you are talking about: get/put/delete vs http://redis.io/commands

sure, dependes of course if you're using redis only for a simple key value store.

Re: LevelDB: a fast and lightweight key/value database library

#10

Post by necubi » Sun, May 08, 2011, 4:34 PM UTC

Note that this is not a database server, like Redis or Memcached. This is a database library, more along the lines of sqlite. In particular: "There is no client-server support builtin to the library. An application that needs such support will have to wrap their own server around the library" and only one process can access a database a time.