4 ms·
There is an easy fix for this, that is also the recommended way to use bitmaps in Redis: split your bitmap among multiple keys. For instance you want to set bi
by antirez 15y ago
There is an easy fix for this, that is also the recommended way to use bitmaps in Redis: split your bitmap among multiple keys.
For instance you want to set bit i, but you want k bits per every key, the you do:
keyname = "bitmap:"+(i/k)
keybit = i%k
k can be fairly large, like 128k bytes per key. It's still small but big enough for keys overhead to be negligible.
- firefoxman1 15y agoWow, that's almost exactly how I implemented it: var bucketSize = 8190; ... var bucketNumber = Math.floor(userId / bucketSize), bitInBucket = userId % bucketSize; ...correction on my last comment, looks like I use ~8 thousand bits per bucket, not 8 million.