git.rot13.org Git - gnt-info/blob - doc/drbd-modify-resync-rate.txt

   1
   2
   3 Primary:
   4
   5 drbdsetup disk-options --c-min-rate=300M <resource number>
   6
   7 Secondary:
   8
   9 drbdsetup disk-options --c-min-rate=300M <resource number>
  10 drbdsetup disk-options --c-fill-target=20M <resource number>
  11 drbdsetup show <resource number> - then take a look at address:port for _this_host and _remote_host and then do this:
  12
  13 drbdsetup net-options <_this_host address:port> <_remote_host address:port> --max-buffers=36k --sndbuf-size=1024k --rcvbuf-size=2048k
  14
  15 # primary
  16
  17 root@r1u28:~# grep -A 3 Sync /proc/drbd
  18  2: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent B r-----
  19     ns:659920972 nr:0 dw:4919308 dr:685106104 al:6946 bm:0 lo:4 pe:0 ua:4 ap:0 ep:1 wo:f oos:3625043016
  20         [==>.................] sync'ed: 15.4% (3540080/4182016)M
  21         finish: 49:21:38 speed: 20,380 (12,288) K/sec
  22
  23 root@r1u28:~# drbdsetup show 2
  24 resource resource2 {
  25     options {
  26     }
  27     net {
  28         protocol                B;
  29         max-buffers             36864;
  30         sndbuf-size             1048576; # bytes
  31         rcvbuf-size             2097152; # bytes
  32         cram-hmac-alg           "md5";
  33         shared-secret           "7db38910e6822aa309beac17be18adf3f07a1bf0";
  34         after-sb-0pri           discard-zero-changes;
  35         after-sb-1pri           consensus;
  36     }
  37     _remote_host {
  38         address                 ipv4 10.80.2.51:11034;
  39     }
  40     _this_host {
  41         address                 ipv4 10.80.2.53:11034;
  42         volume 0 {
  43             device                      minor 2;
  44             disk                        "/dev/oscarvg/ebacd5f5-b172-4988-955c-a36dcd6c8377.disk1_data";
  45             meta-disk                   "/dev/oscarvg/ebacd5f5-b172-4988-955c-a36dcd6c8377.disk1_meta";
  46             disk {
  47                 size                    8564768768s; # bytes
  48                 c-plan-ahead            10; # 1/10 seconds
  49                 c-delay-target          1; # 1/10 seconds
  50                 c-max-rate              98304k; # bytes/second
  51                 c-min-rate              32768k; # bytes/second
  52             }
  53         }
  54     }
  55 }
  56
  57
  58
  59 # secondary
  60
  61 root@r1u32:/srv/gnt-info/doc# grep -A 3 Sync /proc/drbd
  62 25: cs:SyncTarget ro:Secondary/Primary ds:Inconsistent/UpToDate B r-----
  63     ns:0 nr:654510900 dw:654510900 dr:0 al:8 bm:0 lo:0 pe:4 ua:0 ap:0 ep:1 wo:f oos:3630421688
  64         [==>.................] sync'ed: 15.3% (3545332/4182016)M
  65         finish: 48:05:37 speed: 20,964 (12,260) want: 12,320 K/sec
  66
  67 root@r1u32:~# drbdsetup show 25
  68 resource resource25 {
  69     options {
  70     }
  71     net {
  72         protocol                B;
  73         max-buffers             36864;
  74         sndbuf-size             1048576; # bytes
  75         rcvbuf-size             2097152; # bytes
  76         cram-hmac-alg           "md5";
  77         shared-secret           "7db38910e6822aa309beac17be18adf3f07a1bf0";
  78         after-sb-0pri           discard-zero-changes;
  79         after-sb-1pri           consensus;
  80     }
  81     _remote_host {
  82         address                 ipv4 10.80.2.53:11034;
  83     }
  84     _this_host {
  85         address                 ipv4 10.80.2.51:11034;
  86         volume 0 {
  87             device                      minor 25;
  88             disk                        "/dev/oscarvg/ebacd5f5-b172-4988-955c-a36dcd6c8377.disk1_data";
  89             meta-disk                   "/dev/oscarvg/ebacd5f5-b172-4988-955c-a36dcd6c8377.disk1_meta";
  90             disk {
  91                 size                    8564768768s; # bytes
  92                 c-plan-ahead            10; # 1/10 seconds
  93                 c-delay-target          1; # 1/10 seconds
  94                 c-max-rate              98304k; # bytes/second
  95                 c-min-rate              32768k; # bytes/second
  96             }
  97         }
  98     }
  99 }
 100
 101
 102 ## modifications
 103
 104 root@r1u28:~# drbdsetup disk-options --c-min-rate=50M 2
 105 root@r1u28:~# drbdsetup disk-options --c-plan-ahead=50 2
 106 root@r1u28:~# drbdsetup disk-options --c-delay-target=20 2
 107
 108 root@r1u32:~# drbdsetup disk-options --c-min-rate=50M 25
 109 root@r1u32:~# drbdsetup disk-options --c-plan-ahead=50 25
 110 root@r1u32:~# drbdsetup disk-options --c-delay-target=20 25
 111
 112 https://www.linbit.com/blog/drbd-sync-rate-controller/
 113 describes values which don't match well with my setup
 114