Hypertable的升级

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Step 2 - Install the New Package

Cluster Installation

The Hypertable binaries can either be downloaded prepackaged, or you can compile them from source code. To install the prepackaged version, download the Hypertable package (.dmg, .rpm, or .tar.bz2) that you want to install and put it somewhere accessible on the source machine (admin1 in this example). Modify the hypertable_version and default_pkg variables at the top of the Capfile to contain the version of Hypertable you are installing and the absolute path to the package file on the source machine, respectively.  For example, if you're upgrading to version 0.9.7.0 and using the RPM package, set the variables as follows.

1. set :hypertable_version, "0.9.7.0"
   
2. set :default_pkg,        "/tmp/hypertable-0.9.7.0-linux-x86_64.rpm"

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To distribute and install the binary package on all necessary machines, issue the following command.  This command will cause the package to get rsync'ed to all participating machines and installed with the appropriate package manager (rpm, dpkg, or tar) depending on the package type.

1. $ cap install_package

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An alternate approach to installing binaries cluster-wide is to use Capistrano to distribute the binaries with rsync. On admin1 (the machine from which you administer the cluster) be sure Hypertable is installed (see Standalone installation below) in the location specified by the install_dir variable at the top of the Capfile and that the hypertable_version variable at the top of the Capfile matches the version you are installing (/opt/hypertable and 0.9.7.0 in this example). Then distribute the binaries with the following command.

1. $ cap dist

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Standalone Installation

To begin the package installation, switch to the directory containing the package file and then issue the command listed below for your operating system.

Redhat, CentOS, or SUSE Installation

1. $ sudo rpm -ivh --replacepkgs --nomd5 package.rpm

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Debian or Ubuntu Installation

1. $ sudo dpkg --install package.deb

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Bzipped Archive Installation

1. $ sudo tar xjvf package.tar.bz2

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Mac installation

Double-click the package.dmg file and follow the instructions

The Redhat, Debian, and Mac packages will install Hypertable under a directory by the name of /opt/hypertable/$VERSION by default.  You will need to change the ownership of the installation files and directories to the owner that you plan to launch the services as. For example:

1. sudo chown -R john:staff /opt/hypertable/$VERSION

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Step 3 - Upgrade

Cluster Installation

For cluster installations, run the following command:

1. $ cap upgrade

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This command performs the following actions:

1 Verifies that the upgrade is format compatible

2 Copies the contents of the conf/, hyperspace/, fs/, run/, and log/ directories from the old installation (referenced from the current symlink) into the new installation. If any of these directories are symlinked, then an identical symlink will be created in the new installation and the contents are not copied for that directory.

3 Sets the current symlink on all machines to point to the new installation

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Standalone Installation

For standalone installations, run the following commands.  You'll need to change the VERSION variable assignment to the version you are upgrading to, in this example it is 0.9.7.0.

1. VERSION=0.9.7.0
   
2. /opt/hypertable/$VERSION/bin/upgrade.sh /opt/hypertable/current $VERSION
   
3. rm -f /opt/hypertable/current
   
4. ln -s /opt/hypertable/$VERSION /opt/hypertable/current

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Step 4 - Start Hypertable

For cluster installations, run the following command:

1. $ cap start

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For standalone installations, run the following command:

1. /opt/hypertable/current/bin/start-all-servers.sh local

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FORMAT INCOMPATIBLE UPGRADE

If the new release you are installing is incompatible with the old release, you will need to backup and restore all of your tables. See the section on how to backup and restore tables. Here's the basic upgrade sequence:

1 Backup your tables using the backup.sh script shown under Backup and Restore
2 Remove existing installation (e.g. rm -rf /opt/hypertable/$OLDVERSION)
3 Install the new release (see Installation)
4 Restore your tables using the restore.sh script shown under Backup and Restore

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over.