Block Busting

2.1 Naming ServiceThe Naming Service provides a mechanism by which human-friendly names areassociated with (‘bound to’) objects so that these objects can be looked up given their names. The objects typically represent service access points, communication endpointsand other resources that provide some sort of service.The Naming Service imposes neither a specific layout nor a convention on either ..

2.1 Lock ServiceThe Lock Service is a distributed lock service, which is intended for use in a cluster where processes in different nodes1 might compete with each other for access to a shared resource.The Lock Service provides entities called lock resources, which application processes use to coordinate access to shared resources.The Lock Service provides a simple lock model supporting two locki..

2.1 Checkpoint ServiceThe Checkpoint Service provides a facility for processes to record checkpoint dataincrementally, which can be used to protect an application against failures. When recovering from fail-over or switch-over situations, the checkpoint data can be retrieved, and execution can be resumed from the state recorded before the failure.Checkpoints are cluster-wide entities that are de..

2.1 Event ServiceThe Event Service is a publish/subscribe multipoint-to-multipoint communicationmechanism that is based on the concept of event channels. One or more publisherscommunicate asynchronously with one or more subscribers by means of events overa cluster-wide entity named event channel.Events consist of a standard header and zero or more bytes of publisher event data.Multiple publisher..

2.1 Users of the Notification Service LibraryUsers of the Notification Service library run on cluster nodes as defined by the ClusterMembership Service (see [4]).2.1.1 ProducerA notification producer generates notifications (using the Producer API of the NotificationService).2.1.2 ConsumerA consumer consumes notifications that were generated by producers. If a consumeris not interested in all no..

2 OverviewThis specification defines the Message Service within the Application Interface Specification(AIS). 2.1 Message ServiceThe Message Service specifies a buffered message-passing system based on theconcept of a message queue for processes on the same or on different nodes1. Messagesare written to message queues and read from them. A single message queuepermits a multipoint-to-point commun..

멀티프로토콜 Border Gateway Protocol+ IPv6에서의 멀티프로토콜 BGP는 IPv4의 멀티프로토콜 BGP와 같은 기능 및 혜택을 제공합니다. RFC 2858,Multiprotocol Extensions for BGP-4는 BGP4를 위한 멀티프로토콜 확장자를 새로운 속성으로 정의하고 있습니다.RFC 2545, Use of BGP-4 Multiprotocol Extensions for IPv6 Interdomain Routing은 멀티프로토콜 BGP의 개선사항에 IPv6 주소군과 Network Layer Reachability Information(NLRI) 그리고 next hop(목적지로의 경로 상에 있는 다음 라우터) 속성에 대한 지원 등이 포함되어 있다고 설명하고 있습니다. 이 속성..

1. ifconfig 명령으로 확인하다보면 Scope에 대한 내용이 나온다.이게 뭘 나타내는건지 잘 모르겠다. 그래서 좀 찾았다. % ifconfig eth2 Link encap:Ethernet HWaddr 18:A9:05:66:23:D6 inet6 addr: fec0::1aa9:5ff:fe66:23d6/64 Scope:Site inet6 addr: 2001::1aa9:5ff:fe66:23d6/64 Scope:Global inet6 addr: fe80::1aa9:5ff:fe66:23d6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:526074 errors:0 dropped:0 overruns:0 frame:0 TX p..

1. 최근에 active된 노드에서 바인딩 되어있는 서버 소켓에 대해서 알고 싶은경우 사용하면 보기에 편하다. # netstat -nlptu Active Internet connections (only servers)Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:34434 0.0.0.0:* LISTEN 7228/rsql_server tcp 0 0 0.0.0.0:35330 0.0.0.0:* LISTEN 18869/ha_hblr tcp 0 0 0.0.0.0:34435 0.0.0.0:* LISTEN 15860/rsql_server tcp 0 0 0.0.0.0:34437 0.0.0.0:* LISTEN..

아래의 명령으로 확인가능하다.# /sbin/ip -6 tunnel show mode anyCannot guess tunnel mode. 만약에 위와 같이 결과가 나온 경우에 아래 처럼 입력해보면 결과가 나오는데이 경우에는 IPv6-in-IPv6 인 터널에 대해서만 출력된다. 현재 명령 수행중인 장비에서는 아래처럼 하나만 존재함. # /sbin/ip -6 tunnel showsit0: ipv6/ip remote any local any ttl 64 nopmtudisc