Patent ID: 8498964
Filing Date: 2013-07-30
Classification: G06F,H04L

Abstract:
1. A method of writing data in a distributed database system having a plurality of members and a master, comprising: receiving a write request comprising a set of computer instructions at an originating member, wherein the originating member stores a local copy of a Dynamic Host Control Protocol (DHCP) database, wherein the DHCP database includes Dynamic Host Control Protocol (DHCP) related data, and wherein the write request includes associating a first IP address allocated using DHCP with a first device on a first network; applying the received write request comprising the set of computer instructions to a version of a database on the originating member for provisionally writing data in the version of the database on the originating member and placing the received write request comprising the set of computer instructions in a journal queue of items for propagating to the master, wherein the applying the write request to the version of the database on the originating member and the placing the write request in the journal queue of items for propagating to the master are performed within an atomic transaction, wherein the write request is associated with one or more operations to define the atomic transaction, and wherein the atomic transaction includes writing to a version of the database on an active node of the originating member and writing to a version of the database on a passive node of the originating member; propagating the write request to the master, wherein the master stores a master copy of the DHCP database; determining, using a processor, whether the propagated write request is associated with a conflict, wherein determining whether the propagated write request is associated with the conflict includes determining that the first IP address is associated with both the first device and a second device on the first network thereby resulting in an IP address allocation conflict on the first network; and in an event it is determined that the propagated write request is associated with the conflict, sending to the originating member an indication that the write request is associated with the conflict.