Preparing the metadata server for upgrade

This topic describes how to check the current state of the cluster and stop the metadata server that you are upgrading.

Prerequisites

You can also prevent the metadata server from restarting automatically when it is down by issuing the stopautorestart command as described in stopautorestart.
To maximize the availability of the SAN File System cluster in the event of a power outage, ensure that the following conditions are met before you prepare the metadata server for upgrade:
  • A correctly installed SAN File System configuration requires that each power supply within a SAN File System engine be powered by separate and independent power circuits. When the engines are connected in this manner, there can be no single point of failure in the configuration.
  • Of the two power supplies in each engine, at least one of these should be powered through an uninterruptible power supply (UPS).
  • If you do not use a UPS, then use the RSA II's external power supply and connect it to a UPS as described below.
The external power supply for the RSA II adapter provides access to the RSA II event log if power to the metadata server engine (in which the RSA II adapter is installed) is not available. Perform the following steps to connect the power-supply power cord to your server:
  1. Connect the power-supply cable to the external power-supply connector on the RSA II.
  2. Connect one end of the power cord to the connector on the power-supply adapter.
  3. Connect the other end of the power cord to an uninterruptible power supply.
  4. Verify that the RSA II power LED is lit, which means that there is power to the RSA II

Steps

  1. From the master metadata server engine, change directories to the binaries directory:
    cd /usr/tank/admin/bin
  2. Check the current state of the cluster:
    /usr/tank/admin/bin/sfscli lsserver
  3. Stop the metadata server that you are going to upgrade:
    /usr/tank/admin/bin/sfscli stopserver server_name
  4. When prompted to confirm that you want to stop this server, respond with yes.
  5. Verify that the server has stopped:
    /usr/tank/admin/bin/sfscli lsserver server_name
    The selected server should be listed as Not Running.
  6. Optional: If you are using a heterogeneous file sharing feature, obtain and install the Samba Winbind update from www.samba.org.

Parent topic: Upgrading metadata server engines

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