Hi ! I have a simple setup of 2 PC (with linux Red-Hat) where the first PC is the primary machine and the second the backup. I use DRBD for data replication and Red-Hat cluster suite for HA (High Availability). I have tested both.
Now I NEED a COMMON IP ADDRESS (or Master/unique IP address) for... (0 Replies)
Hi ! I have a simple setup of 2 PC (with linux Red-Hat) where the first PC is the primary machine and the second the backup. I use DRBD for data replication and Red-Hat cluster suite for HA (High Availability). I have tested both.
Now I NEED a COMMON IP ADDRESS (or Master/unique IP address) for... (3 Replies)
hello Gurus,
My current set up is 3 to 1 Cluster (SUN Cluster 3.2) running oracle database. Task is to reboot the servers. My query is about the procedure to do the same.
My understanding is suspend the databases to avoid switchover. Then execute the command scshutdown to down the cluster... (4 Replies)
Hi all, i have 3 nodes cluster (Centos 5 cluster suit) with out quorum disk,
node vote = 1,
the value of a quorum = 2,
when 2 nodes going offline, cluster services are destoys.
How i can save the cluster and all services(move all services to one alive node)
with out quorum disk when other... (3 Replies)
I am new to setting up sun solaris 10 cluster, I have 2 sun sparc t3-1 servers (identical), going to use them as web servers (sun one java web server 7), looking for data replication and real time fail over. My question is do I need external storage to configure the cluster? or I can just use... (3 Replies)
Hi
we have 2 solaris 10 servers in veritas cluster.
also we have oracle cluster on the database end.
now we have a requirement to reboot both the servers as it has been running for more than a year.
can any one tell what is the procedure to bring down the cluster services in both the nodes... (7 Replies)
Hi all.
May I get some expert advice on troubleshooting performance issues of a 1000 nodes Apache LB cluster. Users report slow loading/response of webpages. Different websites are hosted on this cluster for different clients. But all are reporting the same issue.
Could you please let me know... (1 Reply)
Hi,
A customer I'm supporting once upon a time broke their 2 cluster node database servers so they could use the 2nd standby node for something else. Now sometime later they want to bring the 2nd node back into the cluster for resilance. Problem is there are now 3 VG's that have been set-up... (1 Reply)
Is there any way to create a arbitrary node for ocfs2 on a virtual machine (others are physical servers) so it won't go panic when one of physical server goes down?
This is for load balanced application servers.
Any setting example or tips?
Thanks. (0 Replies)
Hi All;
I try to build a Redhat Cluster (CentOS 6) on vmware. But each node sees the other down like:
# clustat
Cluster Status for mycluster @ Wed Apr 8 11:01:38 2015
Member Status: Quorate
Member Name ID Status
------ ---- ... (0 Replies)
Discussion started by: Meacham12
0 Replies
LEARN ABOUT NETBSD
rb_tree_iterate
RBTREE(3) BSD Library Functions Manual RBTREE(3)NAME
rbtree -- red-black tree
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/rbtree.h>
void
rb_tree_init(rb_tree_t *rbt, const rb_tree_ops_t *ops);
void *
rb_tree_insert_node(rb_tree_t *rbt, void *rb);
void
rb_tree_remove_node(rb_tree_t *rbt, void *rb);
void *
rb_tree_find_node(rb_tree_t *rbt, const void *key);
void *
rb_tree_find_node_geq(rb_tree_t *rbt, const void *key);
void *
rb_tree_find_node_leq(rb_tree_t *rbt, const void *key);
void *
rb_tree_iterate(rb_tree_t *rbt, void *rb, const unsigned int direction);
DESCRIPTION
rbtree provides red-black trees. A red-black tree is a binary search tree with the node color as an extra attribute. It fulfills a set of
conditions:
1. Every search path from the root to a leaf consists of the same number of black nodes.
2. Each red node (except for the root) has a black parent.
3. Each leaf node is black.
Every operation on a red-black tree is bounded as O(lg n). The maximum height of a red-black tree is 2lg (n+1).
TYPES
rb_tree_t
A red-black tree.
typedef signed int (*const rbto_compare_nodes_fn)(void *context, const void *node1, const void *node2);
The node-comparison operator. Defines an ordering on nodes. Returns a negative value if the first node node1 precedes the second
node node2. Returns a positive value if the first node node1 follows the second node node2. Returns 0 if the first node node1 and
the second node node2 are identical according to the ordering.
typedef signed int (*const rbto_compare_key_fn)(void *context, const void *node, const void *key);
The node-key comparison operator. Defines the order of nodes and keys. Returns a negative value if the node node precedes the key
key. Returns a positive value if the node node follows the key key. Returns 0 if the node node is identical to the key key accord-
ing to the ordering.
rb_tree_ops_t
Defines the operator for comparing two nodes in the same tree, the operator for comparing a node in the tree with a key, the offset
of member rb_node_t within a node, and the opaque context passed to the operators. Members of rb_tree_ops_t are
rbto_compare_nodes_fn rbto_compare_nodes;
rbto_compare_key_fn rbto_compare_key;
size_t rbto_node_offset;
void *rbto_context;
rb_node_t
A node in a red-black tree has this structure as a member.
FUNCTIONS
rb_tree_init(rbt, ops)
Initialize the red-black tree rbt. Let the comparison operators given by ops define the order of nodes in the tree for the purposes
of insertion, search, and iteration. rb_tree_init() always succeeds.
rb_tree_insert_node(rbt, rb)
Insert the node rb into the tree rbt. Return inserted node on success, already existing node on failure.
rb_tree_remove_node(rbt, rb)
Remove the node rb from the tree rbt.
rb_tree_find_node(rbt, key)
Search the tree rbt for a node exactly matching key. If no such node is in the tree, return NULL. Otherwise, return the matching
node.
rb_tree_find_node_geq(rbt, key)
Search the tree rbt for a node that exactly matches key and return it. If no such node is present, return the first node following
key or, if no such node is in the tree, return NULL.
rb_tree_find_node_leq(rbt, key)
Search the tree rbt for a node that exactly matches key and return it. If no such node is present, return the first node preceding
key or, if no such node is in the tree, return NULL.
rb_tree_iterate(rbt, rb, direction)
If direction is RB_DIR_LEFT, return the node in the tree rbt immediately preceding the node rb or, if rb is NULL, return the last
node in rbt or, if the tree is empty, return NULL.
If direction is RB_DIR_RIGHT, return the node in the tree rbt immediately following the node rb or, if rb is NULL, return the first
node in rbt or, if the tree is empty, return NULL.
CODE REFERENCES
The rbtree interface is implemented in common/lib/libc/gen/rb.c.
SEE ALSO queue(3), tree(3)HISTORY
The rbtree interface first appeared in NetBSD 6.0.
AUTHORS
Matt Thomas <matt@NetBSD.org> wrote rbtree.
Niels Provos <provos@citi.umich.edu> wrote the tree(3) manual page. Portions of this page derive from that page.
BSD August 19, 2012 BSD