Minutes 2025-01-16 - Revision history

D2wn at 01:58, 15 February 2025

2025-02-15T01:58:44Z

← Older revision		Revision as of 01:58, 15 February 2025
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	* Trying to get the equipment for LUG shirts		* Trying to get the equipment for LUG shirts
	[[Category:Meeting Minutes]]		[[Category:Meeting Minutes]]
			__NOEDITSECTION__

D2wn at 22:36, 14 February 2025

2025-02-14T22:36:01Z

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 ** potential Zigbee talk
 ** hosting an access control booth to do OSDP challenges
 * Idea for making cards that are LUG-themed
 * Trying to get the equipment for LUG shirts

D2wn at 22:31, 14 February 2025

2025-02-14T22:31:01Z

← Older revision		Revision as of 22:31, 14 February 2025
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	=== RAID (and ZFS) By: Noah ===		=== RAID (and ZFS) By: Noah ===

	* RAID stands for “Redundant Array of [Inexpensive/~~Independant~~] Disks”		* RAID stands for “Redundant Array of [Inexpensive/Independent] Disks”
	* Used by enterprises for high availability on drives and resiliency.		* Used by enterprises for high availability on drives and resiliency.

Line 49:		Line 49:
	* calls RAIDs something different RAID0 -> stripe		* calls RAIDs something different RAID0 -> stripe
	* Described as paranoid because it doesn’t trust anything from your disks and constantly checks and compares information to parity calculation.		* Described as paranoid because it doesn’t trust anything from your disks and constantly checks and compares information to parity calculation.
	* Shell server is set with ZFS in RAID10 all in one single zpool, which allows the shell to put a quota on datasets so no users can get out of hand		* Shell server is set with ZFS in RAID10 all in one single zpool, which allows the shell to put a quota on datasets, so no users can get out of hand
	* Extra features		* Extra features
	** has a cache vdev that reads in a ring buffer		** has a cache vdev that reads in a ring buffer
Line 68:		Line 68:
	* CEPH		* CEPH
	** Different take on filesystems		** Different take on filesystems
	** only 6-9 servers with ~~SEPG~~ under LUG jurisdiction		** only 6-9 servers with CEPH under LUG jurisdiction
	** Treats all disks in the cluster as one giant group		** Treats all disks in the cluster as one giant group
	** Overkill for our purposes		** Overkill for our purposes
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	* Cypher-Con is happening soon		* Cypher-Con is happening soon
	** Not gonna be reimbursed by RED TEAM or college		** Not gonna be reimbursed by RED TEAM or college
	** happening in ~~milluwake~~		** happening in Milwaukee
	** provided two free hotel rooms		** provided two free hotel rooms
	* Got a subnet from IT		* Got a subnet from IT
	** Total of 30-ish public addresses		** Total of 30-ish public addresses
	** can use it to reverse-net for people who don’t have their own public IP addresses		** can use it to reverse-net for people who don’t have their own public IP addresses
	** potential ~~Zigby~~ talk		** potential Zigbee talk
	** hosting an access control booth to do OSDP challenges		** hosting an access control booth to do OSDP challenges
	* Tunnel Bob - cops have chased him through the tunnels and have yet to apprehend him talked about ~~tunnelers~~ ~~who~~ ~~would~~ ~~make~~ ~~master~~ ~~keys and break~~ into ~~the~~ steam ~~tunnelers~~ (~~vatting~~/tunneling)		* Tunnel Bob - cops have chased him through the tunnels and have yet to apprehend him, talked about guys at MIT that would get into steam tunnels (vadding/tunneling)
	** mentioned in the jargon file		** 'vadding' mentioned in the jargon file
	* ~~watch out for~~ elevator ~~counterweights~~		*** Mentions "elevator rodeo"
			**** "Watch out for elevator counterweights"
	* idea for printing cards that are LUG-themed to replace the current id’s
	* ~~trying~~ to ~~get~~ ~~the~~ ~~stuff~~ ~~for~~ LUG ~~shirts~~		* Idea for making cards that are LUG-themed
			* Trying to get the equipment for LUG shirts
	[[Category:Meeting Minutes]]		[[Category:Meeting Minutes]]

D2wn: initial commit

2025-02-14T22:27:06Z

initial commit

New page

=== RAID (and ZFS) By: Noah ===

* RAID stands for “Redundant Array of [Inexpensive/Independant] Disks”
* Used by enterprises for high availability on drives and resiliency.

=== Drawbacks over flat Disks ===

* increased power draw

=== RAID levels ===

* RAID0
** Storage is that of every disk combined
** Fastest for reading and writing
** not really used anymore
* RAID1
** One disk replicated across every other disk
** Common for boot drives
* RAID5
** Any one disk is allowed to fail in a given array without losing any data
** used to be a gold standard, but fell out of favor due to disk size increasing
* RAID6
** Any ''two'' disks can fail in a given array without losing data
** the new gold standard
** if disks fail during rebuild, it allows another to fail.

==== Nested RAID levels ====

* RAID10
** RAID01 (bad)
** WMTU uses RAID60

=== Weird RAID levels ===

* RAID2
** implemented own error correction
** no reason to use it at all because HDDS implements its own error correction
* RAID3
** Striped data at byte-level rather than block levels
** Replaced by RAID5
** used in video streaming

=== ZFS ===

* zfs is the storage administrator, while the user only has to check in
* arrays are now pools
* logical volumes are now datasets
* has its own approach to logical structure
* calls RAIDs something different RAID0 -> stripe
* Described as paranoid because it doesn’t trust anything from your disks and constantly checks and compares information to parity calculation.
* Shell server is set with ZFS in RAID10 all in one single zpool, which allows the shell to put a quota on datasets so no users can get out of hand
* Extra features
** has a cache vdev that reads in a ring buffer
** SLOG, stores the ZFS intent
* biggest issue: licensing
** Sun was trying to get out of the GPL and then have parasite companies from directly shipping ZFS
** now oracle has ZFS and has first-party support on Solaris
** maintains BTRFS support
* OpenZFS
** last open-source version of ZFS
** Under MIT license
** used to be better supported on the BSD’s
* BTFRS
** made a few advancements in filesystems since ZFS
** Great for home labs
** biggest problem: no RAID5/6, might not ever be supported
** Better Linux integration, don’t have to worry about importing kernel modules
* CEPH
** Different take on filesystems
** only 6-9 servers with SEPG under LUG jurisdiction
** Treats all disks in the cluster as one giant group
** Overkill for our purposes
** the cluster self-manages
** common for VM images
** can pick and choose the redundancy per file

=== LUG News ===

* Cypher-Con is happening soon
** Not gonna be reimbursed by RED TEAM or college
** happening in milluwake
** provided two free hotel rooms
* Got a subnet from IT
** Total of 30-ish public addresses
** can use it to reverse-net for people who don’t have their own public IP addresses
** potential Zigby talk
** hosting an access control booth to do OSDP challenges
* Tunnel Bob - cops have chased him through the tunnels and have yet to apprehend him talked about tunnelers who would make master keys and break into the steam tunnelers (vatting/tunneling)
** mentioned in the jargon file
* watch out for elevator counterweights
* idea for printing cards that are LUG-themed to replace the current id’s
* trying to get the stuff for LUG shirts
[[Category:Meeting Minutes]]