Skip to main content

Boot up ubuntu faste

Ubuntu reached the 10 second boot time with Lucid Lynx. what if your system isn’t quite reaching that point?




You can speed it up using profiling option. To do this follow these steps:



1.At your boot screen press “e” (for edit).

2.Use your arrow key and move down to the entry beginning with “kernel”.

3.Press “e” again.

4.Add “profile” (no quotes) at the end of this line.

5.Hit Enter.

6.Click “b” (for boot).

The firs time you boot with profile it will take a little longer. What this is doing is profiling your boot process so it knows what files are accessed and then sorts them according to how they are stored on your drive. Your next boot should be considerably faster.

Comments

Post a Comment

Popular posts from this blog

Configuring the virtual path devices

We recommend that you start with a "fresh" disk configuration, so it is a good idea to delete all previously configured FC adapters and their child (disk) devices. On node1, we checked which disks are still defined: {node1:root}/-> lspvhdisk0 0022be2ab1cd11ac rootvg activehdisk1 0022be2a3d02ead0 Nonehdisk2 0022be2a4cbbafd8 Nonehdisk3 none NoneThese are the internal SCSI disk drives {node1:root}/-> lscfg grep disk+ hdisk3 U1.9-P2/Z2-A8 16 Bit LVD SCSI Disk Drive (36400 MB)+ hdisk2 U1.9-P2/Z1-A8 16 Bit LVD SCSI Disk Drive (36400 MB)+ hdisk1 U1.9-P1/Z2-A8 16 Bit LVD SCSI Disk Drive (36400 MB)+ hdisk0 U1.9-P1/Z1-A8 16 Bit LVD SCSI Disk Drive (36400 MB)In order to include the ESS disks, run the configuration manager on each node: {node1:root}/-> cfgmgr -vSince ESS was configured with two host paths for each node (node1a and node1b), this results in two hdisks on the nodes. Actually, those two logical hdisks represent the same physical disk, accessed via the two ...
Post a Comment
Read more

The HACMP clstat command does not work

Clinfo daemon started? The clstat command retrieves the information from the clinfo daemon. This daemon is not started automatically. It is an option in the SMIT HACMP startup menu (smitty clstart). If it is not running, stop HACMP on this node, and start it up again with clinfo activated. To check the status of the HACMP processes: lssrc -a | grep -E "ES | svcs" SNMP version in AIX 5L version 5.2 AIX 5L version 5.2 uses SNMP version 3 agents, whereas HACMP uses a SNMP version 1 configuration. Both clinfo and CSPOC require SNMP version 1. With the default SNMP agent, the clinfo daemon is not able to supply cluster information, thus the clinfo command will not work properly. Run the script provided in Example 3-38 to switch to version 1 agents. Example 3-38 Switch SNMP agents to version 1 #!/bin/kshLOG=/var/adm/chg_snmpd.logtouch $LOG/usr/es/sbin/cluster/utilities/clstop -N -g >> $LOG 2>&1sleep 5for i in muxatmd aixmibd snmpmibd hostmibd snmpddosto...
Post a Comment
Read more

Typical Oracle RAC configurations

All configurations are based on the following building blocks: Hardware Server nodes Storage Networking Software Operating system Cluster software Oracle RAC (application) Application architecture Oracle9i RAC on RAW devices is based on a shared disk architecture. Figure 2-1 shows a two-node cluster. The lower solid line is the primary Oracle interconnect, the middle dashed line is the secondary Oracle interconnect. For high availability, both these networks should be defined in the HACMP as "private". HACMP/ESCRM provides Oracle9i RAC with the infrastructure for concurrent access to disks. Although HACMP provides concurrent access and a disk locking mechanism, this mechanism is not used. Oracle, instead, provides its own locking mechanism for concurrent data access, integrity, and consistency. Volume groups are varied on all the nodes, thus ensuring short failover time. This type of concurrent access can only be provided for RAW ...
Post a Comment
Read more