Updates from February, 2015 Toggle Comment Threads | Keyboard Shortcuts

  • Sachin Thapa 22:46 on February 21, 2015 Permalink | Reply
    Tags: Netbackup,   

    Netbackup Cheat Sheet 

    Master Server Daemons/Processes

    Request daemon bprd
    Scheduler bpsched (started with bprd)
    Netbackup database manager bpdbm (started with bpsched)
    Job Monitor bpjobd (started with bpdbm)

    Media Server Daemons/Processes (More …)

     
  • Sachin Thapa 22:44 on February 21, 2015 Permalink | Reply
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    Veritas Cluster Tasks 

    Create a Service Group

    hagrp -add groupw
    hagrp -modify groupw SystemList sun1 1 sun2 2
    hagrp -autoenable groupw -sys sun1

    Create a disk group resource , volume and filesystem resource

    We have to create a disk group resource, this will ensure that the disk group has been imported before we start any volumes
    hares -add appDG DiskGroup groupw
    hares -modify appDG Enabled 1
    hares -modify appDG DiskGroup appdg
    hares -modify appDG StartVolumes 0
    (More …)

     
  • Sachin Thapa 22:43 on February 21, 2015 Permalink | Reply
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    Veritas Cluster Cheat sheet 

    LLT and GRAB

    VCS uses two components, LLT and GAB to share data over the private networks among systems.
    These components provide the performance and reliability required by VCS.

    LLT LLT (Low Latency Transport) provides fast, kernel-to-kernel comms and monitors network connections. The system admin configures the LLT by creating a configuration file (llttab) that describes the systems in the cluster and private network links among them. The LLT runs in layer 2 of the network stack
    GAB GAB (Group membership and Atomic Broadcast) provides the global message order required to maintain a synchronised state among the systems, and monitors disk comms such as that required by the VCS heartbeat utility. The system admin configures GAB driver by creating a configuration file ( gabtab).

    LLT and GAB files (More …)

     
  • Sachin Thapa 22:42 on February 21, 2015 Permalink | Reply
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    Veritas Cluster 

    Cluster Information

    Veritas cluster 4.0 can have upto 32 nodes.

    LLT (Low-Latency Transport)

    veritas uses a high-performance, low-latency protocol for cluster communications. LLT runs directly on top of the data link provider interface (DLPI) layer ver ethernet and has several major junctions:

    • sending and receiving heartbeats
    • monitoring and transporting network traffic over multiple network links to every active system within the cluster
    • load-balancing traffic over multiple links
    • maintaining the state of communication
    • providing a nonroutable transport mechanism for cluster communications.

    (More …)

     
  • Sachin Thapa 22:41 on February 21, 2015 Permalink | Reply
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    Veritas File System 

    Veritas Filesystem ( VxFS) is an extent based, intent logging file system. VxFS is geared toward Unix environments that require high performance and availability and deal with large amounts of data.

    VxFS features: –

    • Extent based allocation
    • Extent attributes
    • Fast filesystem recovery
    • Access control lists (ACL)
    • Online administration
    • Online backup
    • Enchanced I/O and mount options
    • Improved synchronous writes
    • Support for large filesystems (up to 2 terabytes)
    • Support for large files (up to 1 terabytes)
    • Veritas quicklog

    (More …)

     
  • Sachin Thapa 22:40 on February 21, 2015 Permalink | Reply
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    Remove Veritas volume from root disk 

    In the example below, the server pegasus has two internal disks (c0t0d0 and c0t1d0) under Veritas Volume Manager control. The operating system is mirrored between the two devices.

    1. From the “ok” prompt, boot from the cdrom device into single-user mode:
    2. Perform a filesystem check on the root filesystem:
    3. Update the /a/etc/system file, removing references to the VxVM root device:

    (More …)

     
  • Sachin Thapa 22:39 on February 21, 2015 Permalink | Reply
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    Veritas Volume Manager Tasks 

    Using slices to create minimal rootdg

    veritas already installed vxdctl add disk c0t0d0s4 type=simple
    vxdisk -f init c0t0d0s4 type=simple
    vxdg adddisk disk01=c0t0d0s4

    You can now remove/move the remain disks from rootdg

    veritas installed but not setup vxconfigd –d ( if already started use vxconfig –m disabled)
    vxdctl init
    vxdg init rootdg
    vxdctl add disk c0t0s0s4 type=simple
    vxdisk -f init c0t0d0s4 type=simple
    vxdg adddisk disk01=c0t0d0s4
    vxdctl enable
    rm /etc/vx/reconfig.d/state.d/install-db

    (More …)

     
  • Sachin Thapa 22:36 on February 21, 2015 Permalink | Reply
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    Veritas Volume Manager 

    VM daemons

    vxconfigd Maintains system configuration in the kernel & disk (private region). If the daemon is stopped it does not disable any configuration state loaded into the kernel, it only affects the ability to make configuration changes until vxconfigd is restarted.

    It can be in three states:
    Enable = Normal mode
    Disable = Most operations cannot be be used
    Booted = Normal startup while using boot disk group

    vxrelocd Monitors for failure events and relocates failed subdisks
    vxconfigbackupd Used to backup configuration chnages, the files created can be used with vxmake to restored lost groups.
    vxnotify Display veritas volume manager events used with the vxconfigd daemon
    vxcached used to administer a cache object that is assoicated with volumes that have one or more space-optimized snapshots. When the usage of a cached volume reaches the high watermark vxcached autom,atically grows the cache volume if required and configured
    vxattachd Monitors VxVM for disks being attached and reattaches a detached site if the disks belongs to that sire become accessible, the daemon monitors vxnotify command and waits for a failed disk, when the disk is attached vxattachd attempts to online the disk, if successful it then starts recovery using vxrecover
    vxdbd Handles comunication to and from the storage foundation product, it uses port 3233
    Kernel Info
    Kernel States The kernel can be in three states:

    Enabled – both private and public regions are accessible
    Disabled – no private or public regions are accessible
    Detached – only private regions are accessible

    (More …)

     
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