|
Local (primary) site | Remote sites
-------------------- | ------------
|
D1 D2 Dn |
| | | |
+---+- ... -+ |
| |
REPLOG-----------------+- SLINK1 ------------+
| | | |
SLINK0 (special case) | | |
| | | |
+-----+ ... + | | +----+- ... -+
| | | | | | | |
LD1 LD2 LDn | | RD1 RD2 RDn
| |
+-- SLINK2------------+
| | |
| | +----+- ... -+
| | | | |
| | RD1 RD2 RDn
. |
. |
. |
+- SLINKm ------------+
| |
| +----+- ... -+
| | | |
| RD1 RD2 RDn
|
D = Top level mapped device accessed by application (eg. DBMS log/data devices)
REPLOG = Remote Replication Log managing a circular buffer of writes
SLINK = Site Link to local/remote site (ie. transport plus related properties)
LD = Local Device being replicated
RD = Remote device, the LD is replicated to