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README_maglev
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README_maglev
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Rake scripts and ruby files to support installation and management of several
MagLev server instances.
The original project is at http://github.com/ottobehrens/gemstone-scripts
The scripts provide the following services:
* create, manage and destroy MagLev server instances
* start, stop and show status of MagLev server instances
* Manage environment variables needed for each MagLev server instance
* backup and restore MagLev repositories
By default, these scripts assume / setup / manage the following
directories:
|--------------------------------------------------+-------------------------|
| The installation directory. | $MAGLEV_HOME |
| | |
| There need be only one of these per computer. | |
| It contains the install of MagLev and GemStone. | |
| It is the source of the new extents. Many | |
| MagLev server instances share the common code | |
| here. The VM code, ruby libraries and | |
| documentation live here. | |
|--------------------------------------------------+-------------------------|
| The config directory. | $MAGLEV_HOME/etc/conf.d |
| | |
| Contains a .conf file for each MagLev server. | |
| The list of currently managed servers is | |
| derived from the .conf file names in this | |
| directory. | |
|--------------------------------------------------+-------------------------|
| Per-server repository | $MAGLEV_HOME/data |
| | |
| Each server gets a named directory under | |
| here that holds the extent and tranlogs | |
| for just that server. | |
|--------------------------------------------------+-------------------------|
| The base log directory | $MAGLEV_HOME/log |
| | |
| Each named server gets its own named directory | |
| under here for log files. | |
|--------------------------------------------------+-------------------------|
| Directory to hold lock files for all servers | $MAGLEV_HOME/locks |
|--------------------------------------------------+-------------------------|
| Directory to hold backup files for all servers | $MAGLEV_HOME/backups |
|--------------------------------------------------+-------------------------|
Many of the directories will have sub-directories or files based on the
"name" of the MagLev server.
So, for a server named "devel", we'd have:
|--------------+-------------------------------------|
| Install Dir | $MAGLEV_HOME |
|--------------+-------------------------------------|
| Config File | $MAGLEV_HOME/etc/conf.d/devel.conf |
|--------------+-------------------------------------|
| Log Dir | $MAGLEV_HOME/log/devel |
|--------------+-------------------------------------|
| Data Dir | $MAGLEV_HOME/data/devel |
|--------------+-------------------------------------|
| Extent Dir | $MAGLEV_HOME/data/devel/extent |
|--------------+-------------------------------------|
| Tranlog Dir | $MAGLEV_HOME/data/devel/tranlog |
|--------------+-------------------------------------|
| Locks Dir | $MAGLEV_HOME/locks |
|--------------+-------------------------------------|
| Backup Dir | $MAGLEV_HOME/backups |
|--------------+-------------------------------------|
The following environment variables are setup:
|------------------+---------------------------------|
| GEMSTONE | $MAGLEV_HOME/gemstone |
|------------------+---------------------------------|
| GEMSTONE_NAME | devel |
|------------------+---------------------------------|
| GEMSTONE_LOGDIR | $MAGLEV_HOME/log/gemstone/devel |
|------------------+---------------------------------|
| GEMSTONE_DATADIR | $MAGLEV_HOME/data/devel |
|------------------+---------------------------------|
Each MagLev server name represents a separate MagLev server instance.
All of these share a GemStoneInstallation (a version of the GemStone
product installed on the machine, e.g., GemStone 3.0.0 Build: 64bit-21842)