PHP memcache Hash Method equalization Test

Two hashing methods are supported: CRC32 FNV

The configuration is as follows:

; Hash function {CRC32, FNV}

memcache.hash_function= FNV

Set Key script:

<?php$cluster = array (Array (' Host '  =>  ' 127.0.0.1 ',  ' Port '  =>  ' 11211 '), Array (' Host '  =>  ' 127.0.0.1 ',  ' Port '  =>  ' 11212 '), Array (' Host '  =>   ' 127.0.0.1 ',  ' Port '  =>  ' 11213 '), Array (' Host '  =>  ' 127.0.0.1 ',  ' Port '  =>  ' 11214 '), Array (' Host '  =>  ' 127.0.0.1 ',  ' Port '  =>  ' 11215 '),); $ memcache = new memcache;foreach  ($cluster  as  $mc)  {$host  =  $MC [' Host ']; $port  =  $MC [' Port '];if  ($memcache->addserver ($host,  $port))  {echo  "Add   $host: $port  to cluster\n ";}  else {echo  "failed to add  $host: $port  to cluster\n";}} $ok  = 0;for  ($n =1;  $n  <= 200000 ;  $n +)  {  $key  =   "K". $n;if  (!  $memcache->set ($key,  1))  {echo  FAILED&NBSP;TO&NBSP;SET&NBSP; $key \ n ";}  else {$ok  ++;} if  ($n  % 100 == 0)  {echo  "completed set  $n  key to  Cache\n ";}} echo  "set ok:  $ok \ n"; $memcache->close ();? >

To start the cache script:

#!/bin/bashpkill memcachedif [$? = 0];thenecho "Kill all Memcached" Elseecho "failed to kill cached" Exit 1fimemcached-d -P 11211-u memcached-m 64-c 1024x768 &memcached-d-P 11212-u memcached-m 64-c 1024x768 &memcached-d-P 11213-u m  Emcached-m 64-c 1024x768 &memcached-d-P 11214-u memcached-m 64-c 1024x768 &memcached-d-P 11215-u memcached-m 64 -C 1024x768 &sleep 1ps aux | grep memcached

Result Check script:

#!/bin/basht11211= ' echo Stats | NC 127.0.0.1 11211 | grep Cmd_set | awk ' {print $} ' t11212= ' echo stats | NC 127.0.0.1 11212 | grep Cmd_set | awk ' {print $} ' t11213= ' echo stats | NC 127.0.0.1 11213 | grep Cmd_set | awk ' {print $} ' t11214= ' echo stats | NC 127.0.0.1 11214 | grep Cmd_set | awk ' {print $} ' t11215= ' echo stats | NC 127.0.0.1 11215 | grep Cmd_set | awk ' {print $} ' echo ' 11211 = $T 11211 "echo" 11212 = $T 11212 "echo" 11213 = $T 11213 "echo" 11214 = $T 11214 "echo" 11215 = $T 1 1215 "

Final result comparison:

CRC32:

11211 = 51180

11212 = 47519

11213 = 26179

11214 = 29082

11215 = 46040

Fnv

11211 = 47085

11212 = 35358

11213 = 49721

11214 = 18787

11215 = 49049

PHP memcache Hash Method equalization Test