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• 23:41, 15 August 2023 ‎SSD (hist | edit) ‎[408 bytes] ‎Digimer (talk | contribs) (Created page with "{{header}} '''SSD''' stands for 'Solid State Drive'. These are like traditional Hard Disk Drives but instead of using a rotating magnetic platter, they use a flash RAM device. This allows the drive to be much more tolerant of motion as there is no risk of centripetal forces causing the read head on a tradition hard drive from contacting the rotating platters. SSD uses no moving parts. {{footer}}")
• 23:40, 15 August 2023 ‎HDD (hist | edit) ‎[354 bytes] ‎Digimer (talk | contribs) (Created page with "{{header}} A "hard drive", also known as a "fixed disk", "hard disk drive (HDD)", is a physical device, traditionally using rotating magnetic platters, to store data. Modern hard drives can instead use flash memory, though often these are called 'Solid State Drives', though they server the same function and use the same interfaces. {{footer}}")
• 23:40, 15 August 2023 ‎RAID (hist | edit) ‎[49,250 bytes] ‎Digimer (talk | contribs) (Created page with "{{fs_header}} Redundant Array of Inexpensive Disks. This is a collection of storage devices (traditionally platter-based hard drives) used together in one of 6 base "levels" to provide redundancy. RAID level 0 is not a true RAID level, but is often referenced and thus worth noting. It is not, however, redundant. * RAID0 - Striping only, NO redundancy (not a true RAID level) * RAID1 - Mirroring only. * RAID2 - Proprietary RAI...")
• 19:41, 15 August 2023 ‎Scancore (hist | edit) ‎[9,669 bytes] ‎Digimer (talk | contribs) (Created page with "{{howto_header}} {{warning|1=This is little more that raw notes, do not consider anything here to be valid or accurate at this time.}} = ScanCore - The Decision Engine = ScanCore is, at its core, a "decision engine". It was created as a way for Anvil! systems to make intelligent decisions based on data coming in from any number of places. It generates alerts for admins, so in this regard it is an alert and monitoring solution, but that is almost a secondary benef...")
• 19:14, 15 August 2023 ‎Intelligent Availability (hist | edit) ‎[8,666 bytes] ‎Digimer (talk | contribs) (Created page with "{{header}} Intelligent Availability™ is the successor to High Availability. For a system to be defined as "IA", it must meet the following requirements and design focus; 1. Where HA is reactive, IA is proactive. 2. Complete stack redundancy with no single point of failure. 3. IA must survive both failure and recovery without interruption. 4. Over-provisioning/thin-provisioning is not allowed. 5. Performance must remain consistent in a degraded state. 6. Human in...")
• 19:12, 15 August 2023 ‎Anvil! (hist | edit) ‎[554 bytes] ‎Digimer (talk | contribs) (Created page with "{{howto_header}} "'''Anvil!'''" is the name of the Intelligent Availability™ platform. The platform consists of; * A full-stack, zero single point of failure hardware architecture * The Striker web user interface; Designed simple to minimize potential for human error. * Scancore decision engine that proactively mitigates changing risks; ** Automated live-migration ** Autonomous Load shedding and recovery ** Autonomous Emergency shutdown and recovery * What...")
• 19:11, 15 August 2023 ‎UPS (hist | edit) ‎[461 bytes] ‎Digimer (talk | contribs) (Created page with "{{header}} thumb|right|500px|APC brand [http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SMT1500RM2U SMT1500RM2U] UPS. Photo by APC. A UPS, Uninterrupted Power Supply, is a device that uses batteries to provide line voltage to equipment when the power from building mains is lost. These are used extensively in server rooms, data centres and in Anvil! platforms. {{footer}}")
• 18:59, 15 August 2023 ‎Configuring an APC AP7900 (hist | edit) ‎[18,414 bytes] ‎Digimer (talk | contribs) (Created page with "{{howto_header}} thumb|right|400px|APC [http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=AP7900 AP7900 8-Outlet 1U] 120vAC PDU. Photo by [http://www.apcmedia.com/prod_image_library/index.cfm?search_item=AP7900# APC]. = Purpose of This Tutorial = The APC-brand '''AP7900''' (and '''AP7900B''') switched PDU is an excellent backup fence device. All ''Anvil!'' systems we build use a pair of th...")
• 18:51, 15 August 2023 ‎PDU (hist | edit) ‎[680 bytes] ‎Digimer (talk | contribs) (Created page with "{{header}} thumb|right|400px|APC [http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=AP7900 AP7900 8-Outlet 1U] 120vAC PDU. Photo by [http://www.apcmedia.com/prod_image_library/index.cfm?search_item=AP7900# APC]. In clustering, an addressable '''PDU''' ('''P'''ower '''D'''istribution '''U'''nit) is, essentially, a network-connected power bar where the power to any given plug can be remotely and individually con...")
• 18:49, 15 August 2023 ‎PSU (hist | edit) ‎[406 bytes] ‎Digimer (talk | contribs) (Created page with "{{header}} A '''P'''ower '''S'''upply '''U'''nit, or "PSU", is the device that converts mains power into the various voltages needed inside of a computer, switch or other electronic device. In Anvil! clusters, most devices have redundant power supplies. This allows a device to be powered by two different power sources so that the loss of one power rail doesn't cause the device to shut down. {{footer}}")
• 18:44, 15 August 2023 ‎BMC (hist | edit) ‎[298 bytes] ‎Digimer (talk | contribs) (Created page with "{{howto_header}} '''BMC''' is an acronym for "Baseboard Management Card", which is the physical circuit board to provides IPMI functionality to a server. Learn more: * [http://en.wikipedia.org/wiki/Baseboard_management_controller#Baseboard_management_controller BMC] on Wikipedia. {{footer}}")
• 18:09, 15 August 2023 ‎OEM (hist | edit) ‎[171 bytes] ‎Digimer (talk | contribs) (Created page with "{{header}} OEM is an acronym for '''O'''riginal '''E'''quipment '''M'''anufacturer. It generally refers to the company that built a physical device or widget. {{footer}}")
• 18:06, 15 August 2023 ‎SAN (hist | edit) ‎[396 bytes] ‎Digimer (talk | contribs) (Created page with "{{header}} SAN is an acronym for '''''S'''torage '''A'''rea '''N'''etwork''. It differs from NAS in that it makes it's disk space available to multiple servers at the block level. It generally uses many disk drives in an array using high-speed copper or fiber networking technologies and is generally fault tolerant. See: http://en.wikipedia.org/wiki/Storage_area_network<br /> {{footer}}")
• 18:06, 15 August 2023 ‎Fencing (hist | edit) ‎[1,694 bytes] ‎Digimer (talk | contribs) (Created page with "{{header}} In clustering, '''fence''' (also called 'stonith') refers to the action of removing a node from the cluster. A fence is carried out when the cluster software determines a node is faulty. Once this decision is made, the cluster software consults it's configuration for information on how to carry out the fence. The fence action is in turn carried out by a software or hardware action. The details of which depend on the fence method(s) configured for the node be...")
• 18:05, 15 August 2023 ‎Quorum (hist | edit) ‎[1,804 bytes] ‎Digimer (talk | contribs) (Created page with "{{header}} In clustering terms, '''quorum''' is synonymous with "majority". All nodes and quorum disks, when used, are assigned a number of votes. The cluster is then told how many votes to expect (the sum of all nodes plus the quorum disk). When a problem occurs that caused the cluster to split into two or more partitions, each partition will add up the votes of itself plus the devices it can talk to. If the resulting count is greater than half, that partition is deter...")
• 18:04, 15 August 2023 ‎The 2-Node Myth (hist | edit) ‎[8,242 bytes] ‎Digimer (talk | contribs) (Created page with "{{header}} A common argument in the availability world is "You need at least 3-nodes for availability clustering". This article aims to disprove that. To understand this argument we must first discuss two concepts in availability clustering; Quorum and fencing (also called 'stonith'). = Quorum = "Quorum" is a term used to define simple majority. Nodes in a cluster have a default value of '1'. Said mathematically, quorum is > 50%. When a cluster is quora...")
• 23:46, 11 August 2023 ‎How To (hist | edit) ‎[51 bytes] ‎Digimer (talk | contribs) (Created page with "{{howto_header}} How-to articles; * {{footer}}")
• 21:16, 11 August 2023 ‎IPMI (hist | edit) ‎[27,359 bytes] ‎Digimer (talk | contribs) (Created page with "{{howto_header}} IPMI is an acronym for '''I'''ntelligent '''P'''latform '''M'''anagement '''I'''nterface. This is a technology built into many server-grade mainboards. This is called the '''B'''aseboard '''M'''anagement '''C'''ontroller, or '''BMC'''. IPMI, via the BMC, allows "out of band" access to a server. This means that, via an IPMI interface, a user can remotely connect to a server regardless of it's power state and sensor data. The BMC is isolated from the hos...")
• 01:42, 4 August 2023 ‎Anvil! Networking (hist | edit) ‎[16,350 bytes] ‎Digimer (talk | contribs) (Created page with "{{howto_header}} The Anvil! Cluster implements four main network types, each of which there could be one or more of. {| class="wikitable" !style="white-space:nowrap; text-align:center;"|Network Name !style="white-space:nowrap; text-align:center;"|Prefix !style="white-space:nowrap; text-align:center;"|Subnet !style="white-space:nowrap; text-align:center;"|Used By !style="white-space:nowrap; text-align:center;"|Description |- !style="white-space:nowrap; text-align:l...")
• 03:07, 27 July 2023 ‎Configuring Networking in RHEL9 (hist | edit) ‎[1,412 bytes] ‎Digimer (talk | contribs) (Created page with "{{howto_header}} This tutorial covers a few different network configurations. This should be generally useful, but it is written with the Anvil! cluster member machine. Striker dashboards generally had two interfaces, directly configured. Anvil! nodes consist of two sub-nodes, acting in unison. Those sub-nodes have 8 interfaces, paired into four bonds. Two of those bonds will have IPs directly, and two will have bridge interfaces. DR hosts often match the hardwa...")

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