| | |
| | | Total<subscript>conn</subscript> is expressed as follows.</para> |
| | | |
| | | <equation> |
| | | <mathphrase>Total<subscript>conn</subscript> = N<subscript>RS</subscript> * |
| | | (N<subscript>RS</subscript>-1)/2 + N<subscript>DS</subscript></mathphrase> |
| | | <mathphrase>Total<subscript>conn</subscript> = (N<subscript>RS</subscript> * |
| | | N<subscript>RS</subscript>-1)/2 + N<subscript>DS</subscript></mathphrase> |
| | | </equation> |
| | | |
| | | <para>Here, N<subscript>RS</subscript> is the number of replication servers, |
| | | and N<subscript>DS</subscript> is the number of stand-alone directory |
| | | servers. In other words, if you have only three servers, then |
| | | Total<subscript>conn</subscript> is three with no stand-alone servers. |
| | | servers. In other words, if you have only 3 servers, then |
| | | Total<subscript>conn</subscript> is 3 with no stand-alone servers. |
| | | However, if you have two data centers, and need 12 directory servers, then |
| | | with no stand-alone directory servers Total<subscript>conn</subscript> is |
| | | (12 * 11)/2 or 66. Yet, with four stand-alone replication servers, and 12 |
| | | (12 * 11)/2 or 66. Yet, with 4 stand-alone replication servers, and 12 |
| | | stand-alone directory servers, Total<subscript>conn</subscript> is |
| | | (4 * 3)/2 + 12, or 18, with only four of those connections needing to go |
| | | over the WAN. (By running four directory servers that also run replication |