Page Comparison

...

• Check the performance of BAB through BAB usage and latency.
  

  • You can check the usage rate of the BAB set by calculation of "2. Operating Environment4. Physical Memory Specifications".

  • You can see where bottlenecks have occurred by increasing or decreasing the latency value.

• Output Sample

  • Capacity : Indicates the BAB size set in the resource, in Kilobytes.
  • Use (Size) : Indicates BAB usage rate and Size. The unit of size is Kilobytes.
  • BAB Latency is the current (cur), average (avg), maximum (max), and minimum (min) values ​​for the TX, RX, Compress, and Decompress items. The unit is microseconds.
    

    
    

    Code Block
    theme DJango title memusage collapse true
    < general output > [root@c73-p1 dgkim]# drx-ctl mem all -------------------------------------------------------------------------------------- Name Capacity Use (Size) Full Counts -------------------------------------------------------------------------------------- DR-1-3-c73-p2-c73-p1 716800 [>>>>>>>.....................] 23% (163277) 0 10240 [............................] 0% (0) - -------------------------------------------------------------------------------------- DR-2-3-c73-p2-c73-p1 512000 [............................] 0% (0) 0 10240 [............................] 0% (0) - -------------------------------------------------------------------------------------- Active bab counts : 2 < verbose output > [root@c73-p1 dgkim]# drx-ctl mem all -v ---------------------------------------------------------------------------------------------------------- Name Capacity Begin End Use (Size) Full Counts ---------------------------------------------------------------------------------------------------------- DR-1-3-c73-p2-c73-p1 716800 340236152 504137496 [>>>>>>>.....................] 22% (160060) 0 10240 0 0 [............................] 0% (0) - ---------------------------------------------------------------------------------------------------------- DR-2-3-c73-p2-c73-p1 512000 64273922 64273922 [............................] 0% (0) 0 10240 0 0 [............................] 0% (0) - ---------------------------------------------------------------------------------------------------------- Active bab counts : 2 ---------------------------------------------------------------------------------------------------------- name Latency cur avg max min ---------------------------------------------------------------------------------------------------------- DR-1-3-c73-p2-c73-p1 TX BAB 00:00:00.000000 00:00:00.443516 00:00:06.765142 00:00:00.000101 RX BAB 00:00:00.000000 00:00:00.000000 00:00:00.000000 00:00:00.000000 Compress 00:00:00.000088 00:00:00.000087 00:00:00.001439 00:00:00.000001 Decompress 00:00:00.000000 00:00:00.000000 00:00:00.000000 00:00:00.000000 ---------------------------------------------------------------------------------------------------------- DR-2-3-c73-p2-c73-p1 TX BAB 00:00:00.000000 00:00:00.001627 00:00:00.004173 00:00:00.000261 RX BAB 00:00:00.000000 00:00:00.000000 00:00:00.000000 00:00:00.000000 Compress 00:00:00.000000 00:00:00.000113 00:00:00.001440 00:00:00.000001 Decompress 00:00:00.000000 00:00:00.000000 00:00:00.000000 00:00:00.000000 ---------------------------------------------------------------------------------------------------------- Active bab counts : 2 [root@c73-p1 dgkim]#

    
    

...

• To view compression statistics, use the filter option in Output mode. 
  • The compression ratio represents the average value and the compression efficiency of the data to be transmitted can be checked.
  • Compression plug-in performance can be checked by the average compression time (cp-avg) and the decompression average time (dc-avg).

• Sample command.

  Code Block
  drx-ctl st all -v --filter=name,type,ratio,cur,best,worst,cp-avg,cp-cur,cp-min,cp-max,dc-avg,dc-cur,dc-min,dc-max

  
  

• Output Sample
  
  • The unit of size is Kilobytes.

  • 압축 ratio는 (압축전 사이즈 / 압축후 사이즈)로 계산되기 때문에 가독성을 위해서 소수점 둘째 자리까지 출력됩니다. The compression ratio is calculated as (original size / compressed size), so it is round down to 2 decimal places for readability.

  • The unit of compress(cp), decompress(de), encypto(ec), decrypto(dc) is microseconds.

    
    

    Code Block
    theme DJango title statistics collapse true
    < verbose output > [root@c69-1 drbd.d]# drx-ctl st all -v ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ name type tx rx t-raw t-net r-raw r-net ratio cur best worst cp-avg cp-cur cp-min cp-max ec-avg ec-cur ec-min ec-max dc-avg dc-cur dc-min dc-max de-avg de-cur de-min de-max ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ r0-c69-2-c69-1 data 184 0 13660 6821 0 1 1.93 0.00 18.07 1.00 0.000098 0 0.000001 0.013818 0 0 0 0 0 0 0 0 0.000189 0 0.000001 0.002338 r0-c69-2-c69-1 meta 0 0 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ All connections : 2, Established : 2 [root@c69-1 drbd.d]# < use the filter option output> [root@c69-1 drbd.d]# drx-ctl st all -v --filter=name,type,ratio,cur,best,worst,cp-avg,cp-cur,cp-min,cp-max,dc-avg,dc-cur,dc-min,dc-max ----------------------------------------------------------------------------------------------------------- name type ratio cur best worst cp-avg cp-cur cp-min cp-max dc-avg dc-cur dc-min dc-max ----------------------------------------------------------------------------------------------------------- r0-c69-2-c69-1 data 1.91 1.94 18.07 1.00 0.000088 0.000139 0.000001 0.013818 0 0 0 0 r0-c69-2-c69-1 meta ----------------------------------------------------------------------------------------------------------- All connections : 2, Established : 2 [root@c69-1 drbd.d]#

    
    

  • 축약어 설명

    Abbreviations

    축약어Abbreviation	설명Description	축약어Abbreviation	설명Description	축약어Abbreviation	설명Description
    tx	TX speed	ratio	compress average ratio	ec	encrypto
    rx	RX speed	cur	compress current ratio	dc	decrypto
    t-net	TX -Network 전송 사이즈network total relayed bytes	worst	compress worst ratio
    t-raw	TX RAW 사이즈network total transferred bytes	best	compress best ratio
    r-rawnet	RX -Network 전송 사이즈network total relayed bytes	cp	compress
    r-netraw	RX RAW 사이즈network total transferred bytes	de	decompress

    
    

7.3. Optimization procedure

...