The on-coming developers are responsible for these processes!

The intent of these processes is to establish database configurations for a new expedition.

If the off-going developers want to help and time permits--that's wonderful. It's a Catch-22 that probably indicates you need some rest.

Connection Notes

Log into operating system oracle user first; then conduct database user logins.

• Open a SQL Developer session.
• Connect to oracle@k1.ship.iodp.tamu.edu.
• From the prompt k1$ run the commands shown.
• Supply the appropriate credentials.

Example of the above from Windows Terminal (wt.exe),Powershell, PuTTY, Hyperterminal or any other such tool.

ssh oracle@k1.ship.iodp.tamu.edu
cd /backup/export
. oraenv
ORACLE_SID = [oracle] ? LIMSJR (or provide SHIPTEST)
sql me@limsjr# If you are conducting DBA privileged activities, use your DBA accountsql my_dba@limsjr

NOTE: For command-line tools--like sql, sqlplus, rman: if your password has spaces or symbol characters, you must quote the password, e.g.

Run data cleaning and preening scripts

Connect to Oracle as TRANSFER (schema owner) or your DBA account. Doing this work in SQL Developer is often convenient.

• Make appropriate substitutions for current expeditions.
• If you are new to the process, read the footnotes. Ask.

The box_lims_expedition_delete() step is the longest. Monitoring is helpful. Currently takes about 30 minutes--mostly to delete millions of results. Historically saw ranges of 2-8 hours (older hardware, fewer CPUs, slower disks).

If material from another expedition was analyzed on this expedition, it may be necessary to delete that content too, e.g. call box_lims_expedition_delete('344(312)');

1. VARIANCE: If you need to keep some data from the previous expedition for the next expedition, skip this step. Even if you forget, you can still copy what you need from TRANSFER.NEW_tables without having to resort to the data pump import tool.
2. VARIANCE: If you need to keep some data from the previous expedition for reference on the next expedition, then custom SQL is required to preserve what you need. And you must communicate with the MCS to ensure what you need is preserved on the ASMAN file system--their routine is to expunge the previous expedition.
3. VARIANCE: If multiple expeditions need to be cleaned, repeat the command for each expedition.
4. You must look up and specify ###. The script as written deletes all audit keys <= ### from x_lime_audit_main. The deletion cascades to linked audit detail.
5. Defragmentation of the space used by SAMPLE, TEST, RESULT is recommended, but not required if you are pressed for time. Defragmentation on 398 took an hour to run with current hardware and disk allocation. Older hardware took 9-14 hours.

Cleaning OVERVIEW Menu and Summary Data

Participants for a new expedition have no need to see either menus or data from the previous expeditions database OVERVIEW.
Menus. OVERVIEW menus are stored in LIMS.LIST_ENTRY. View the content where LIST = 'MENU'. Change old expeditions for new expeditions. Drop menus that are not needed. The ODP and DSDP menus should always be retained.
Data clean. The summary content displayed by OVERVIEW lives in LIMS.X_DBOVERVIEW. The table is indexed by expedition, site, and hole. It is sufficient to clean out specific content with a query like this (example)

Discussion

Database Schemas

The database consists of distinct schemas. Each schema serves different functions

• DESCINFO2. Records configuration of parameters, templates, value lists, and users for the descriptive information eco-system.
• LIMS. The sample catalog and repository of experimental results against those samples. Includes a catalog of files (ASMAN) associated with those samples.
• OPS. Repository of drilling operations information. Bathymetry and navigation content was removed from here as of Subic Bay Tie-up 353P Oct 23, 2014. The content is time and activity based, not sample based. Other workflows manage the bulk of this data outside Oracle. What is recorded here is a small subset of the total operational content we keep.
• TRANSFER. Contains scripts and tables for managing data transfer and cleanup processes. Some run here for BOX.
• GEODCAT. Carries taxonomy, templates, observable definitions globally available to GEODESC operators.
• GEODP###. Carries taxonomy, templates, observable definitions specific to the expedition/project.

Cleaning Process Architecture

End-of-expedition processing leaves data in LIMS, TRANSFER. That content may be removed. The beginning-of-expedition processing removes that content. The procedures to conduct the removal are owned by the TRANSFER schema.

An Annoyance: Monitoring for Archive Log Space Filling

Oracle treats the changes resulting from end-of-expedition processing like any other transactions. Due to the size of these transactions it is likely that the 100GiB reserved for archive logging will be consumed. When this occurs, the database blocks all activity until archive log space is freed. All attempts at new transactions will receive the message ORA-00257: archiver stuck.

This method of releasing the archiver assumes there is actually some spare space on the system. Via a DBA account--to increase the amount of archive log space available:
alter system set db_recovery_file_dest_size=1000G scope=memory;

The ODA systems carry plenty of disk. The above will get Oracle back up and running with enough breathing room for you to connect and do the following.

Monitoring Archive Log Generation

The HTTP-based Oracle Enterprise Manager (OEM) provides a page for detailed monitoring and management of archive logs. Pre-requisites for usage

• Request a starter set of credentials and permissions for OEM from the DBAs. Specify which environment you are in.
• OEM credentials are distinct from RDBMS credentials. You must have DBA level privileges and credentials to the database being managed.
• OEM and RDBMS credentials are distinct from operating system credentials. You must have access to the host oracle account for some operations.

(1)
Connect to OEM at https://oemjr.ship.iodp.tamu.edu:7802/em
Login with your OEM credential.

(2)
Select the menu Target > Databases. Click on the link corresponding to the database you wish to manage.
Login with your DBA privileged RDBMS credential.

(3)
To simply monitor archive log usage visit this page.
On the secondary menu select  Administration > Storage > Archive Logs
Refresh the page as-needed to update the statistics.

To manage the archive logs visit this page
On the secondary menu select Availability > Backup & Recovery > Manage Current Backups
Operating system credential is required to send RMAN (recovery manager) commands.

TODO Provide more detail here as we get more practice.

• Must be logged into this page and monitoring the database before the archive logger blocks. If the archive logger is already blocked current experience indicates that OEM is not effective. Direct host login to RMAN becomes necessary.
• The OEM times out your login in about 10/15 minutes. If running out of archive log space is still a real concern with a terabyte of disk, refresh the page frequently.
• Until MCS and developers become more comfortable with the backup process, it is preferable to increase archive log space by the alter system commands above.
• The OEM provides email alerts that trigger on thresholds (e.g. percentage of archive log space filled). Notification settings are determined by the OEM manager.

More info about archive logging

Run this SQL as the DBA to verify info about archive logging status.

Expect output like this

or this

How to Invoke PL/SQL Scripts

All scripts are run from procedures owned by the TRANSFER account. The typical data cleanup and preening session is shown above and repeated here

Most scripts take a single string parameter for expedition. The ASMAN scripts take a single string parameter indicating the catalog to be deleted--usually formed as 'EXP'+'theExpeditionNumber', e.g. 'EXP339'.   Catalogs: DESCINFO and DROPS are kept per user request.

Run the scripts from SQL, SQL*Plus or from within a SQLDeveloper worksheet. SQL and SQL*Plus have the advantage of being light-weight, and provides facilities to spool all transactions that transpire for post-cleanup review and comparison. SQLDeveloper has the advantage of readily reviewing and verifying the scripts being invoked.

The scripts are designed to provide feedback, however the Oracle mechanisms are not real-time. To turn on useful feedback mechanisms, apply these commands from the SQL*PLUS command-line mileage will vary if tried in the context of SQLDeveloper:

To capture the content of a SQL*Plus session, do something like this:

The duration of the session is very dependent on the quantity of data collected. Be patient. It takes time to delete 14-20 million rows. Current takes about 30 minutes. Not too long ago took between 9 and 20 hours.
Special behavior for scripts is noted below. E.g. order of execution is important in some cases, some processes are fast, some are slow. Some should be double-checked.

Data cleanup is routine, but will have variances. The additional scenarios provided below attempt to clarify the variances we encounter. Apply the scenario or combination of scenarios that best fits current expedition requirements.

You will see a number of procedures in TRANSFER that are not documented here. These processes have been in disuse for so long additional thought, testing, and documentation should be applied to them when they come up again. Specific questions? Ask around. Read the code.

A Cookbook and Scenarios.

The routine processes are described first. Then less common scenarios are described.

Clean the TRANSFER schema

Irrevocably and quickly drop all content in the TRANSFER schema tables with "NEW" in their names. No parameter required.

Clean out the ASMAN file catalogs(will also remove Autosaves from Descinfo2)

This script removes the database records only. It is a separate step to clean out the file system for the catalog. You are responsible for the database cleanup. The MCS take care of the file system. Talk with each other.

Repeat box_asman_catalog_delete for as many catalogs as you desire to remove. Confirm removal by re-running the survey script. Commit when done. The DESCINFO and DROPS catalogs are to be preserved--specific request by OPS and DESC technicians.

Clean out LIMS 

This is a longer process, but no more than 30 minutes with current database size and hardware. 6-20 hours is thankfully a historical artifact. Progress of the script can still be checked by counting samples, tests, and particularly results.

Repeat box_lims_expedition_delete for as many expeditions as required. The smaller the quantity of data, the faster it will go.
See detailed process for setting of expedition specific variables.  ----

Recommend the various select count(*) variants as routine content checks before and after the removal step.

This procedure is slow. Data we want to keep is intermixed with data to be deleted. So we do it rows at a time. The database is a 24/7 tool--there's always some activity against it.

These statistics are obsolete and in need of update. Delete of 398 result table content took about 30 minutes.

• Allow 3 hours per 10 million rows of results.
• Allow 3 hours for defragmenting and condensing space allocated to tables and indexes.

This procedure should NOT be run during routine laboratory data collection. For selected tables, it turns off triggers, and reduces archive logging.The procedure MAY be run during periods where only data reporting is being done.

Scenario: Brand new expedition, previous content being removed.

This is the most typical expedition cleanup scenario:

• One expedition of OPS data to delete.
• One expedition of ASMAN content to remove.
• One expedition of LIMS content to remove.

Scenario: Current expedition is continuation of previous.

Previous expedition content is being preserved on ship due to continuation with a new science party. Previously curated and collected samples are for reference only. The "legacy" content should be locked down so that it is not unintentionally modified. There is no special handling for ASMAN content. You have to remember that this expedition is now legacy and remove it at the appropriate time.

Scenario: Remove request codes used by the previous expedition.

The curator manages this using the request code manager application. No developer involvement is required.

Load information being transferred from shore.

Transfer of content has been on an ad hoc basis. In general the need should be flagged before the expedition and managed as needed. Common scenarios are noted here.

Scenario: New containers to be loaded for MAD analyses.

See the MAD container load - process. And additional related documentation on the shore wiki. The names and masses of containers are delivered in a spreadsheet (or text file).

Scenario: Load pre-existing LIMS data

Some expeditions are continuations or extensions of previous work. For convenience they may wish to have a local copy of previous samples and analytical content. In these cases, pre-expedition preparation is preferred. Various methods are available

• Copy content to a TRANSFER schema, export it for transport. On delivery--re-import, copy into the ship production schema.
• Use SQL Developer to export CSV files of the relevant data. Transport them. Reload those records into the ship production schema.

Similar scenarios apply for carrying test data.

Scenario: Load pre-existing ODP, DSDP data

Some expeditions are continuations or extensions of previous work. For convenience, the science party may require a local copy of previous samples and analytical content. If small amounts of legacy material is brought out for re-sampling, re-analysis, it is easiest to just re-catalog the material in LIMS with Catwalk Sample and SampleMaster.

For re-measurement of ODP, DSDP material with current equipment, plan on bring out the sample catalog (site, hole, core, section, section half, whole rounds) migrated into LIMS from Janus some time ago.

Cleaning test data

For new participants and staff to experience and practice using integrated shipboard systems, it is helpful to have some data to play with. The same is required for development that continues between expeditions.

Records are accumulated against an expedition/project called 999. After awhile it is helpful to clean out tests and results. Be judicious and selective. Ask around: is anyone using this data? For example, sometimes end-user testing or development is in progress of which you may not have been aware. Once you have go-ahead, it is often sufficient to clean out tests and results. Unless specifically testing sample cataloging we prefer to avoid the effort of recreating a complete and representative set of samples. These clean out scripts should only be used in the scenario where samples are being preserved [curatorial tests and results], but science data [non-curatorial] tests and results are being removed.

These are encoded in the TRANSFER script UTIL_LIMS_TEST_RESULT_DELETE.