Scheraga's group must confirm decision on (1) partitions AND (2) their capabilities and use.
Why?
ChemIT requires this information to set up the new Matrix. Soon, a lack of a decision will bring this project to a full-stop until the information is provided.
- Initial email sent 7/29/2014 5:30:05 PM to Czarek and Gia. No written confirmation, as of 8/25/14 (Monday).
- Even after confirming ChemIT's initial suggestions, iterations and subsequent clarifications may also be required. For those, we also need the group's continued engagement to ensure ChemIT is doing things to best meet the group's needs.
Current idea:
On external 12 TB Synology system:
- /home (3TB total; on Synology)
- Can be seen by compute nodes. Data stored on compute nodes until work is done, then moved to /home.
- Data on /home removed when not actively needed for their cluster work. Can move the data to /storage, for safe-keeping and convenient access.
- Data is backed up via EZ-Backup.
- A new user gets 50GB, by default.
- The process to request more space is through group designate.
- /storage (8TB total)
- Can NOT be seen by compute nodes.
- This is to store data related only to Scheraga research. No personal files.
- Data is backed up via EZ-Backup.
- The process to request more space is through group designate.
- TBD (1TB total)
- To be used for either expanding /home or /storage at a later date (when we know which needs more space sooner than the other).
On internal 4TB regular hard drive:
- /notbackedup (4TB total)
- For when a researcher needs more temporary space than an individual compute node can provide.
- Researcher must move data off as soon as they are done with it.
- This data is NOT BACKED UP. Use only temporarily, and only when a researcher needs "surge" space.
- No quotas. Thus, potential for researchers to "step on each other".
- Q: Make more robust by adding hard-ware RAID and a 2nd identical drive?
- Cost of RAID card:
- Cost of 2nd identical hard drive:
On internal 256GB SSD hard drive:
Drive is backed up via EZ-Backup, and contains these partitions:
- OS (16-17 GB)
- YUM-installed applications
- And select other cluster-specific applications
- swap (32 GB)
- /data (200+GB; the rest!)
- Applications for researchers (/software -> /data/software)
- Software source files.
Scheraga group must provide to ChemIT two (2) quota numbers for every active user (and info might inform partitions' minimum sizes, required above)
For each current researcher, a quota must separately be specified for their:
ChemIT has provided Gia the current use and single quota for each researcher.
- This quota is a combination of both /home-type use and /storage-type use.
Gia has asked every researcher:
- Desired quota for /home?
- Desired quota for/storage?
- How much data to transfer to Matrix's /storage when it is made available (from their local hard drives, etc.)?
Many researchers have not replied to Gia.
- ChemIT will thus create a report to Gia with when they last logged in.
Scheraga group must approve process for ChemIT to copy researchers' files from old Matrix to the new Matrix.
Idea:
- Create empty /home directories for each user. Leave empty.
- ChemIT copies all a user's data in old Matrix to the new Matrix's "storage" partition. Each researcher selectively moves what is required to their new Matrix home directory.
- OUTCOMES
- Clean /home directories, making restores and debugging much easier over time.
- Pawel supports this approach. He estimates perhaps 1/2 - 1 hour work for each researcher.
- To do: Figure out dates and other timing, including complete downtime.
GPU
Yi must test.
Group documentation
Develop and communicate a community standard of practice.
- Where to host?
- Who to create, organize, and maintain content and associated conventions?
- Negotiate decisions among group, and ensure technical decisions are ones ChemIT can support.
Initial ideas from Pawel and Gia (documented by Oliver, as a favor):
Regulations:
1) Default quotas for new researchers.
How does a user request a bigger quota?
- Document workflow, specifying who needs to approve what, and what info do they need to do that.
- Is there a difference between a temporary quota increase and one which is more permanent?
(2) Rules and expectations (behaviors) of group members
- Ex: Respond in a timely manner, and completely, to requests from group's designate.
(3) Support for researchers using Matrix.
- For a given question, how get it?
- What questions go through group designate, and what goes directly to ChemIT, and how is that done?
- What response can one expect?
Also may want to add: