redis ziplist 压缩列表加新工作流程

2 bytes

curlen-offset-1+nextdiff

curlen-offset-1+nextdiff

zlbytes

zllen

offset = p-zl;

old prevlen

entry2

zlend

p + reqlen

entry2 prevlen 1 byte

entry1

reqlen 1024 bytes

nextdiff = 4

zltail

new prevlen lensize = 5 bytes

prevlen 1 byte

\"2\"

10 bytes

redis ziplist 压缩列表加新工作流程

curlen

nextdiff

reqlen

wenfh2020.com

insert

(gdb) p p$20 = (unsigned char *) 0x10080060c <incomplete sequence \\366\\377>(gdb) p p + reqlen$21 = (unsigned char *) 0x100800a0f \"\"(gdb) p p - nextdiff $22 = (unsigned char *) 0x100800608 \"\\002\"(gdb) p zl$23 = (unsigned char *) 0x100800600 \"\\026\\004\"(gdb) p curlen-offset-1+nextdiff$24 = 6

p

zl

p - nextdiff

entry2 new prev len

\"5\"