Improving key expiration in Redis
Recently, we had an interesting issue where we ran into some performance issues in our Redis clusters. After a lot of time spent debugging and testing we were able to reduce Redis’s memory use in some of our clusters by up to 25% with changes to key expiration. Internally Twitter runs multiple cache services. One of them is backed by Redis. Our Redis clusters store data for some Twitter’s most imp
Redisã®ã‚¯ã‚¨ãƒªãƒ¼ã‚¢ãƒŠãƒ©ã‚¤ã‚¶ãƒ¼ "redis-traffic-stats" を書ãã¾ã—㟠- （ã²ï¼‰ãƒ¡ãƒ¢
redis-traffic-stats ã¨ã„ㆠRedis ã®ã‚¯ã‚¨ãƒªãƒ¼ã‚¢ãƒŠãƒ©ã‚¤ã‚¶ãƒ¼ã‚’作りã¾ã—ãŸã€‚ https://github.com/hirose31/redis-traffic-stats redis-traffic-statsã¯tcpdump -wã§æ›¸ã出ã—ãŸpcapデータを解æžã—ã¦ã€ä»¥ä¸‹ã®ã‚ˆã†ãªçµ±è¨ˆã‚’表示ã—ã¾ã™ã€‚ ç·ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒˆãƒ©ãƒ•ã‚£ãƒƒã‚¯é‡ã¨å¹³å‡byte/sec ç·ãƒªã‚¯ã‚¨ã‚¹ãƒˆæ•°ã¨å¹³å‡ã¨ãƒ”ークã®req/sec コマンド毎ã®ãƒªã‚¯ã‚¨ã‚¹ãƒˆæ•°ã€ç·ãƒªã‚¯ã‚¨ã‚¹ãƒˆæ•°ã«å ã‚る割åˆã€req/secã‚’ã€ãƒªã‚¯ã‚¨ã‚¹ãƒˆæ•°ãŒå¤šã„é †ã«ä¸Šä½10コマンドを表示 コマンド毎ã®ç·è»¢é€ãƒã‚¤ãƒˆæ•°ã€byte/secã‚’ã€ç·è»¢é€ãƒã‚¤ãƒˆæ•°ãŒå¤šã„é †ã«ä¸Šä½10コマンドを表示 コマンド別ã«ã€ã‚ー毎ã®ç·è»¢é€ãƒã‚¤ãƒˆæ•°ã€byte/secã€ãƒªã‚¯ã‚¨ã‚¹ãƒˆæ•°ã€ãƒªã‚¯ã‚¨ã‚¹ãƒˆæ•°ã®å‰²åˆã€req/secã‚’ã€ç·è»¢é€ãƒã‚¤ãƒˆæ•°ãŒå¤šã„é †ã«ä¸Šä½10ã‚ーを表示 時間ã®ã‹ã‹ã£
Custom Redis Command: Performance of C vs Lua
Over the last few days, we've been writing a custom Redis command in C. The command, xdiff, is tailored to a specific use-case: diff'ing a set from a sorted set with an offset and count. A reasonable question is: why not just write it in Lua? Keeping in mind the dangers of such synthetic benchmarks, I decided to compare the C implementation to one written in Lua. The full C implementation can be s
Writing a Custom Redis Command In C - Part 1
Not too long ago, we found ourselves in need of a zdiff command in Redis. We could have implemented it in Lua, like much of our other code, but why not do it straight in Redis? One of the great things about Redis is how clean the codebase is; even for a very rusty C programmer like myself. The first thing you'll want to do is define your command. At the bottom of redis.h add the function signature
Redis bitmaps - Fast, easy, realtime metrics -
At Spool, we calculate our key metrics in real time. Traditionally, metrics are performed by a batch job (running hourly, daily, etc.). Redis backed bitmaps allow us to perform such calculations in realtime and are extremely space efficient. In a simulation of 128 million users, a typical metric such as “daily unique users†takes less than 50 ms on a MacBook Pro and only takes 16 MB of memory. Spo
1
ランã‚ング
ランã‚ング
ランã‚ング
リリースã€éšœå®³æƒ…å ±ãªã©ã®ã‚µãƒ¼ãƒ“スã®ãŠçŸ¥ã‚‰ã›
最新ã®äººæ°—エントリーã®é…ä¿¡
j次ã®ãƒ–ックマーク
kå‰ã®ãƒ–ックマーク
lã‚ã¨ã§èªã‚€
eコメント一覧を開ã
oページを開ã
GitHub - huacnlee/redis-search: Deprecated! High performance real-time prefix search, indexes store in Redis for Rails application
{{#tags}}- {{label}}
{{/tags}}