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(Notes on using Data Replication Function)
In case you use data replication function (without snapshot) with D8 Series, select the minimum
size of cache memory from the following table according to the total HDD capacity and the total
replication volume (RV):
Total
HDD
Other than RAID-6 configuration: up to maximum capacity, in RAID-6 configuration:
Physical capacity
up to 270,000GB
Cache capacity *1
RV total capacity
(When not using
RDR/DR)
RV total capacity
(When using
RDR/DR )
Total
HDD
In RAID-6 configuration: 270,001-530,000GB
Physical capacity
Cache capacity *1
RV total capacity
(When not using
RDR/DR)
RV total capacity
(When using
RDR/DR )
Total
HDD
In RAID-6 configuration: 530,001-790,000GB
Physical capacity
Cache capacity *1
RV total capacity
(When
using
RDR/DR)
RV total capacity
(When using
RDR/DR )
Total
HDD
In RAID-6 configuration: 790,001GB-maximum capacity
Physical capacity
Cache capacity *1
RV total capacity
(When not using
RDR/DR)
RV total capacity
(When using
RDR/DR )
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.
4GB
8GB
-16GB
40TB
40TB
80TB
-
20TB
60TB
4GB
8GB
-16GB
35TB
35TB
75TB
-
15TB
55TB
4GB
8GB
-16GB
30TB
30TB
70TB
-
10TB
50TB
4GB
8GB
-16GB
25TB
25TB
65TB
-
5TB
45TB
-24GB
-32GB
-40GB
120TB
160TB
200TB
80TB
120TB
180TB
-24GB
-32GB
-40GB
115TB
155TB
195TB
95TB
135TB
175TB
-24GB
-32GB
-40GB
110TB
150TB
190TB 230T0B
90TB
130TB
170TB
-24GB
-32GB
-40GB
105TB
145TB
185TB
85TB
125TB
165TB
-48GB
-56GB
-128GB
240TB
280TB
500TB
220TB
260TB
500TB
-48GB
-56GB
-128GB
235TB
275TB
500TB
215TB
255TB
500GB
-48GB
-56GB
-128GB
270TB
500TB
210TB
250TB
500TB
-48GB
-56GB
-128GB
225TB
265TB
500TB
205TB
245TB
500TB
19
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