21
(Notes on using Data Replication Function and Snapshot Function at the same time)
In case you use both data replication and Snapshot with the D8 Series, the minimum size of cache
memory from the following table according to the total HDD capacity, the total capacity of the
replication volume (RV) and the total volume related to Snapshot function.
Total HDD Physical capacity: up to Max. capacity (other than RAID-6), up to 270,000GB
(RAID-6)
C ache
Function
U sable capacity(TB )
~4G B T otal capacity of R V (w /o R D R /D R )
0
5
10
15
20
25
30
35
40
T otal capacity of S napshot related volum e 128
112
96
80
64
48
32
16
0
T otal capacity of R V (w / R D R /D R )
T otal capacity of S napshot related volum es
~8G B T otal capacity of R V (w /o R D R /D R )
0
5
10
15
20
25
30
35
40
T otal capacity of S napshot related volum e 128
112
96
80
64
48
32
16
0
T otal capacity of R V (w / R D R /D R )
0
5
10
15
20
T otal capacity of S napshot related volum e
64
48
32
16
0
~16G B T otal capacity of R V (w /o R D R /D R )
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
T otal capacity of S napshot related volum e 256
240 224 208 192
176
160
144
128
112
96
80
64
48
32
16
0
T otal capacity of R V (w / R D R /D R )
0
5
10
15
20
25
30
35
40
45
50
55
60
T otal capacity of S napshot related volum e 192
176 160 144 128
112
96
80
64
48
32
16
0
~24G B T otal capacity of R V (w /o R D R /D R )
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
T otal capacity of S napshot related volum e 384
368 352 336 320
304
288
272
256
240 224 208 192
176
160
144
128 112
96
80
64
48
32
16
0
T otal capacity of R V (w / R D R /D R )
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
T otal capacity of S napshot related volum e 256
240 224 208 192
176
160
144
128
112
96
80
64
48
32
16
0
~32G B T otal capacity of R V (w /o R D R /D R )
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120 125 130 135
140
145
150
155
160
T otal capacity of S napshot related volum e 512
496 480 464 448
432
416
400
384
368 352 336 320
304
288
272
256 240 224 208
192
176
160
144
128 112
96
80
64
48
32
16
0
T otal capacity of R V (w / R D R /D R )
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
T otal capacity of S napshot related volum e 384
368 352 336 320
304
288
272
256
240 224 208 192
176
160
144
128 112
96
80
64
48
32
16
0
~40G B T otal capacity of R V (w /o R D R /D R )
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120 125 130 135
140
145
150
155
160
T otal capacity of S napshot related volum e 640
624 608 592 576
560
544
528
512
496 480 464 448
432
416
400
384 368 352 336
320
304
288
272
256 240 224 208
192
176
160
144
128
T otal capacity of R V (w /o R D R /D R )
165
170 175 180 185
190
195
200
T otal capacity of S napshot related volum e 112
96
80
64
48
32
16
0
T otal capacity of R V (w / R D R /D R )
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120 125 130 135
140
145
150
155
160
T otal capacity of S napshot related volum e 576
560 544 528 512
496
480
464
448
432 416 400 384
368
352
336
320 304 288 272
256
240
224
208
192 176 160 144
128
112
96
80
64
T otal capacity of R V (w / R D R /D R )
165
170 175 180
T otal capacity of S napshot related volum e
48
32
16
0
~48G B T otal capacity of R V (w /o R D R /D R )
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120 125 130 135
140
145
150
155
160
T otal capacity of S napshot related volum e 768
752 736 720 704
688
672
656
640
624 608 592 576
560
544
528
512 496 480 464
448
432
416
400
384 368 352 336
320
304
288
272
256
T otal capacity of R V (w /o R D R /D R )
165
170 175 180 185
190
195
200
205
210 215 220 225
230
235
240
T otal capacity of S napshot related volum e 240
224 208 192 176
160
144
128
112
96
80
64
48
32
16
0
T otal capacity of R V (w / R D R /D R )
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120 125 130 135
140
145
150
155
160
T otal capacity of S napshot related volum e 704
688 672 656 640
624
608
592
576
560 544 528 512
496
480
464
448 432 416 400
384
368
352
336
320 304 288 272
256
240
224
208
192
T otal capacity of R V (w / R D R /D R )
165
170 175 180 185
190
195
200
205
210 215 220
T otal capacity of S napshot related volum e 176
160 144 128 112
96
80
64
48
32
16
0
~56G B T otal capacity of R V (w /o R D R /D R )
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120 125 130 135
140
145
150
155
160
T otal capacity of S napshot related volum e 896
880 864 848 832
816
800
784
768
752 736 720 704
688
672
656
640 624 608 592
576
560
544
528
512 496 480 464
448
432
416
400
384
T otal capacity of R V (w /o R D R /D R )
165
170 175 180 185
190
195
200
205
210 215 220 225
230
235
240
245 250 255 260
265
270
275
280
T otal capacity of S napshot related volum e 368
352 336 320 304
288
272
256
240
224 208 192 176
160
144
128
112
96
80
64
48
32
16
0
T otal capacity of R V (w / R D R /D R )
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120 125 130 135
140
145
150
155
160
T otal capacity of S napshot related volum e 832
816 800 784 768
752
736
720
704
688 672 656 640
624
608
592
576 560 544 528
512
496
480
464
448 432 416 400
384
368
352
336
320
T otal capacity of R V (w / R D R /D R )
165
170 175 180 185
190
195
200
205
210 215 220 225
230
235
240
245 250 255 260
T otal capacity of S napshot related volum e 304
288 272 256 240
224
208
192
176
160 144 128 112
96
80
64
48
32
16
0
~128G B T otal capacity of R V (w /o R D R /D R )
0
5
10
15
20
25
30
every 5TB
285
290
295 300 305 310
315
320
325
330
335
T otal capacity of S napshot related volum e1024 1024 1024 1024 1024 1024 1024
1024
1024 1024 1024 1024 1024 1024 1024 1024 1008
992
976
T otal capacity of R V (w /o R D R /D R )
340
345 350 355 360
365
370
375
380
385 390 395 400
405
410
415
420 425 430 435
440
445
450
455
460 465 470 475
480
485
490
495
500
T otal capacity of S napshot related volum e 960
944 928 912 896
880
864
848
832
816 800 784 768
752
736
720
704 688 672 656
640
624
608
592
576 560 544 528
512
496
480
464
448
T otal capacity of R V (w / R D R /D R )
0
5
10
15
20
25
30
every 5TB
285
290
295 300 305 310
315
320
325
330
335
T otal capacity of S napshot related volum e1024 1024 1024 1024 1024 1024 1024
1024
1024 1024 1024 1024 1008 992
976
960
944
928
912
T otal capacity of R V (w / R D R /D R )
340
345 350 355 360
365
370
375
380
385 390 395 400
405
410
415
420 425 430 435
440
445
450
455
460 465 470 475
480
485
490
495
500
T otal capacity of S napshot related volum e 896
880 864 848 832
816
800
784
768
752 736 720 704
688
672
656
640 624 608 592
576
560
544
528
512 496 480 464
448
432
416
400
384
Note) The above “RV total capacity (when using RDR/DR)” is the capacity in case the buffer area of
semi-synchronous sequence is 256MB.
*1 128GB is with 4 nodes configuration.