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02:18, 16 August 2023 Digimer talk contribs created page EiB (Created page with "{{header}} IEC base2 notation for exbibytes. * EiB = exbibyte (2^60 / 1,152,921,504,606,846,976 bytes See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}")
02:17, 16 August 2023 Digimer talk contribs created page PiB (Created page with "{{header}} IEC base2 notation for pebibytes. * PiB = pebibyte (2^50 / 1,125,899,906,842,624 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}")
02:17, 16 August 2023 Digimer talk contribs created page TiB (Created page with "{{header}} IEC base2 notation for tebibytes. TiB = tebibyte (2^40 / 1,099,511,627,776 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}")
02:16, 16 August 2023 Digimer talk contribs created page MiB (Created page with "{{header}} IEC base2 notation for mebibytes. * MiB = mebibyte (2^20 / 1,048,576 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}")
02:16, 16 August 2023 Digimer talk contribs created page KiB (Created page with "{{header}} IEC base2 notation for kibibytes. * KiB = kibibyte (2^10 / 1,024 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}")
02:15, 16 August 2023 Digimer talk contribs created page IEC and SI Size Notations (Created page with "{{header}} How data sizes are shortened varies depend on whether the program or author is using base2 and base10 notation. The short-form notation followed by it's English long-form name for each type is listed below. Then it shows in the braces the X to the power of Y value that it represents followed, finally, by the exact number of bytes represented. = base2 Notation = IEC Notation Size -------------- --------------------------------...")
02:15, 16 August 2023 Digimer talk contribs created page Base2 (Created page with "{{header}} Base-2 is a counting system made up of only two digits, '0' and '1'. This is in contrast with the Roman 'Base-10' counting system that uses 10 digits, 0-9. Base-2 is used to represent binary values. {{footer}}")
02:14, 16 August 2023 Digimer talk contribs created page GiB (Created page with "{{header}} IEC base2 notation for gibibytes. GiB = gibibyte (2^30 / 1,073,741,824 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}")
01:55, 16 August 2023 Digimer talk contribs created page TLUG Talk: Storage Technologies and Theory (Created page with "{{talk_header}} '''Note''': This talk is quite old, and much has happened in storage tech since this talk was given. This was the first IT-related public talk I gave and as such, it's not my favourite work. I present it here though for historical reasons. Take it all with a healthy grain a salt. '''''Storage Technologies and Theory''''' '''An AN!Speech to TLUG, May 2002''' = Introduction = Good day! I wanted to speak with you all today to help you make a more e...")
01:54, 16 August 2023 Digimer talk contribs created page Write-back (Created page with "{{header}} Write-back caching is a technology used in disk storage to improve performance. It works by providing an amount of high-speed, volatile memory used to store data destined for non-volatile storage on relatively slow hard drives or solid state drives. Write-back caching is particularly useful on traditional platter-based hard drives and RAID arrays where highly random write access is expected. It allows for writes to be buffered, masking the performance lo...")
01:54, 16 August 2023 Digimer talk contribs created page IOPS (Created page with "{{howto}} IOPS is an acronym for '''I'''nput/output '''O'''perations '''P'''er '''S'''econd. It is a measure of storage performance used to indicate how many read and how many write operations can be serviced, on average, per second. This measurement is particularly important for storage backing services with highly random reads and writes. To learn more: * [https://en.wikipedia.org/wiki/IOPS IOPS on Wikipedia] {{footer}}")
01:53, 16 August 2023 Digimer talk contribs created page File:Brocade icx6450-25 front 01.jpg (rocade [http://www.brocade.com/products/all/switches/product-details/icx-6430-and-6450-switches/index.page ICX6450-48] 4x SFP+, 24x 1Gbps RJ45, 40Gbit stacked switch. Photo by [http://newsroom.brocade.com/Image-Gallery/Product-Images Brocade].)
01:53, 16 August 2023 Digimer talk contribs uploaded File:Brocade icx6450-25 front 01.jpg (rocade [http://www.brocade.com/products/all/switches/product-details/icx-6430-and-6450-switches/index.page ICX6450-48] 4x SFP+, 24x 1Gbps RJ45, 40Gbit stacked switch. Photo by [http://newsroom.brocade.com/Image-Gallery/Product-Images Brocade].)
01:52, 16 August 2023 Digimer talk contribs created page File:Brocade icx6610-48 front-left.png (Brocade [http://www.brocade.com/products/all/switches/product-details/icx-6610-switch/index.page ICX6610-48] 8x SFP+, 48x 1Gbps RJ45, 160Gbit stacked switch. Photo by [http://newsroom.brocade.com/Image-Gallery/Product-Images Brocade].)
01:52, 16 August 2023 Digimer talk contribs uploaded File:Brocade icx6610-48 front-left.png (Brocade [http://www.brocade.com/products/all/switches/product-details/icx-6610-switch/index.page ICX6610-48] 8x SFP+, 48x 1Gbps RJ45, 160Gbit stacked switch. Photo by [http://newsroom.brocade.com/Image-Gallery/Product-Images Brocade].)
01:50, 16 August 2023 Digimer talk contribs created page Split-brain (Created page with "{{howto_header}} {{warning|1=A "split-brain" condition is a potentially catastrophic event in clustering.}} It is a particular risk in two-node clusters, but can occur in larger clusters if quorum is not honoured. This section uses language specific to two node split-brain conditions, but "node" could be replaced with "partition" to describe a subsection of a cluster and still be accurate. A split-brain is a state in which two nodes lose contact with one another a...")
01:47, 16 August 2023 Digimer talk contribs created page Support (Created page with "{{header}} = Community Support = If you need help with an Anvil! cluster, Striker, ScanCore or other AN!Tutorials please use one of the options below. == Mailing List == Support for the Anvil! platform can be found on the [http://clusterlabs.org/wiki/Mailing_lists Cluster Labs] mailing list. * [http://clusterlabs.org/mailman/listinfo/users Clusterlabs - Users] mailing list. == IRC Channel == Support can also be found on the [https://libera.chat/ Libera chat] [...")
01:41, 16 August 2023 Digimer talk contribs created page File:APC AP7931 Front-Right.jpg (APC [http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=AP7900 AP7931 16-Outlet 0U] 120vAC PDU. Photo by [http://www.apcmedia.com/prod_image_library/index.cfm?search_item=AP7931# APC].)
01:41, 16 August 2023 Digimer talk contribs uploaded File:APC AP7931 Front-Right.jpg (APC [http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=AP7900 AP7931 16-Outlet 0U] 120vAC PDU. Photo by [http://www.apcmedia.com/prod_image_library/index.cfm?search_item=AP7931# APC].)
01:40, 16 August 2023 Digimer talk contribs created page File:APC SMT1500 Front-Right.jpg (APC [http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SMT1500 SmartUPS 1500 Pedestal] 120vAC UPS. Photo by [http://www.apcmedia.com/prod_image_library/index.cfm?search_item=SMT1500 APC].)
01:40, 16 August 2023 Digimer talk contribs uploaded File:APC SMT1500 Front-Right.jpg (APC [http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SMT1500 SmartUPS 1500 Pedestal] 120vAC UPS. Photo by [http://www.apcmedia.com/prod_image_library/index.cfm?search_item=SMT1500 APC].)
01:39, 16 August 2023 Digimer talk contribs created page File:APC SMT1500RM2U Front-Right.jpg (APC [http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SMT1500RM2U SmartUPS 1500 RM2U] 120vAC UPS. Photo by [http://www.apcmedia.com/prod_image_library/index.cfm?search_item=SMT1500RM2U APC].)
01:39, 16 August 2023 Digimer talk contribs uploaded File:APC SMT1500RM2U Front-Right.jpg (APC [http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SMT1500RM2U SmartUPS 1500 RM2U] 120vAC UPS. Photo by [http://www.apcmedia.com/prod_image_library/index.cfm?search_item=SMT1500RM2U APC].)
01:38, 16 August 2023 Digimer talk contribs created page Selecting Hardware For Your Anvil! (Created page with "{{howto_header}} This guide's goal is to provide a high-level overview on how to match appropriate hardware for anticipated loads on your ''Anvil!'' platform. = System Requirements = To provide full stack redundancy, there are minimum system requirements. These are not performance requirements, but instead, minimum features and capabilities. = Foundation Pack = The foundation pack consists of redundant power...")
01:24, 16 August 2023 Digimer talk contribs created page Gluster (Created page with "{{header}} See: http://www.gluster.org/docs/index.php/GlusterFS See: http://www.gluster.org/ See: http://en.wikipedia.org/wiki/GlusterFS {{footer}}")
01:23, 16 August 2023 Digimer talk contribs created page DRBD (Created page with "{{header}} '''D'''istributed '''R'''eplicated '''B'''lock '''D'''evice, [https://linbit.com/drbd/ DRBD], is a software product created by [LINBIT https://linbit.com/]. It is, at it's simplest description, a program that insures data on two storage devices, on different hosts, are identical. It differs from programs like gluster and ceph in that it's core focus is resiliency over scalability. In this way, it is a perfect fit for the Anvil! cluster. {{footer}}")
23:54, 15 August 2023 Digimer talk contribs created page Generate 8bit dec to hex to bin chart.pl (Created page with "{{howto_header}} A short script that generates a byte-length chart of decimal to hexadecimal to binary values. <source lang="perl"> #!/usr/bin/perl # Author: Madison Kelly; mkelly@alteeve.com # Date: Jun. 21, 2010 # License: GPLv2 # Be clean use strict; use warnings; # Headers print " Dec. | Hex. | Binary\n"; print "------+-------+-----------\n"; foreach my $dec (0..255) { # Convert the decimal to hexadecimal and pad the result with a lea...")
23:52, 15 August 2023 Digimer talk contribs created page Base-10 (Created page with "{{header}} Base-10 is a counting system made up of ten digits, '0' through '9'. This is in contrast with the binary 'Base-2' counting system that uses only two digits, 0 and 1. Base-10 is used to represent decimal values. {{footer}}")
23:52, 15 August 2023 Digimer talk contribs created page Decimal (Created page with "{{header}} In computing terms, 'decimal' refers to the Base-10 Roman counting system that uses ten base digits (0 through 9) to represent numerical values. It is the "normal" counting system in most societies. {{footer}}")
23:51, 15 August 2023 Digimer talk contribs created page Hex (Created page with "{{header}} The term '''Hex''' is a short form of Hexadecimal. {{footer}}")
23:51, 15 August 2023 Digimer talk contribs created page ASCII (Created page with "{{header}} ASCII is an acronym for 'American Standard Code for Information Interchange'. See: http://en.wikipedia.org/wiki/ASCII Operating systems that follow the ASCII standard will always interpret the lower 7 bits of a byte to represent the same value. These seven bits cover 128 possible combinations. Of those, the first 32 (0-31) and last entry (127) are not printable character, but instead are "control characters". These are codes used to control certain...")
23:50, 15 August 2023 Digimer talk contribs created page Hexadecimal (Created page with "{{header}} Hexadecimal is a method of representing 4 bits of data (known as a nibble) using a single ASCII character in the range from [0-9a-f]. = Use = Hexadecimal is very often used where a long binary string needs to presented to a human user. A good example would be the colour setting used on most modern graphics and web programs. Continuing this example, computer colours are often represented as six hexadecimal digits. Each pair, that is each byte, re...")
23:50, 15 August 2023 Digimer talk contribs created page Nibble (Created page with "{{header}} A nibble is 4 bits and can be represented as single hexadecimal value. {{footer}}")
23:48, 15 August 2023 Digimer talk contribs created page Big Endian (Created page with "{{header}} In a binary string, 'Big Endianess' indicated that the least significant bit is on the right side. A big-endian byte would thus be structured like this: 0 0 0 0 0 0 0 0 <- Binary string consisting of 8-bits. | | | | | | | \- 128 | | | | | | \--- 64 | | | | | \----- 32 | | | | \------- 16 | | | | | | | \----------- 8 | | \------------- 4 | \--------------- 2 \----------------- 1 ^...")
23:47, 15 August 2023 Digimer talk contribs created page Endianess (Created page with "{{header}} Endianess is the term used when describing the relative values of binary digits. There are two types; * Big Endian, where the least significant bit is the left-most value in the binary string. * Little Endian, where the least significant bit is the right-most value in the binary string. {{footer}}")
23:47, 15 August 2023 Digimer talk contribs created page LSB (Created page with "{{header}} 'LSB' is an acronym for 'Least Significant Bit' and is used to indicate 'Endianess' in a binary string. {{footer}}")
23:45, 15 August 2023 Digimer talk contribs created page Little Endian (Created page with "{{header}} In a binary string, 'Little Endianess' indicated that the least significant bit is on the left side of a binary string. A little-endian byte would thus be structured like this: 0 0 0 0 0 0 0 0 <- Binary string consisting of 8-bits. | | | | | | | \- 1 | | | | | | \--- 2 | | | | | \----- 4 | | | | \------- 8 | | | | | | | \----------- 16 | | \------------- 32 | \--------------- 64 \----------------- 128...")
23:45, 15 August 2023 Digimer talk contribs created page Base-2 (Created page with "{{header}} Base-2 is a counting system made up of only two digits, '0' and '1'. This is in contrast with the Roman 'Base-10' counting system that uses 10 digits, 0-9. Base-2 is used to represent binary values. {{footer}}")
23:44, 15 August 2023 Digimer talk contribs created page Binary (Created page with "{{header}} Binary is a form of counting that uses a base-2 system, a counting system with 2 digits. Binary uses only '0' and '1', which relates to an electrical 'low' (0) or 'high' (1) signal. This can conceptually be extended to 'false' (0) or 'true' (1). In computing, binary is used for all forms of calculations. Larger values are expressed as being 'X-bits', where 'X' is the number of 'BInary digiTs' used to create the value. Modern computers generally use multi...")
23:44, 15 August 2023 Digimer talk contribs created page Bits (Created page with "{{header}} A 'Bit' is a single Base-2 'BInary DigiT'; 0 or 1. See 'Binary' for more information. {{footer}}")
23:43, 15 August 2023 Digimer talk contribs created page Byte (Created page with "{{header}} A byte is the smallest unit of storage used in modern computers. It is made of 8 bits and can be arranged in 256 possible combinations. These possible combinations are used to represent a base set of values, the specifics of which depend on the operating system being used. Most modern operating systems conform to ASCII standards and thus share the same representative values for the first 128 possible combinations. In the example below, Little Endian...")
23:42, 15 August 2023 Digimer talk contribs created page Block (Created page with "{{header}} A block is a collection of physical units of storage on a storage device or medium. A common 'block size' is 2,048 bytes, which could consist of 4x512byte sectors on a hard drive. A block is the smallest unit of space that a file system will use when storing data. If a file is smaller that this size, it will still use up the rest of the space. This of a block as a filing cabinet drawer with a set number of file folders (which actually...")
23:41, 15 August 2023 Digimer talk contribs created page SSD (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 Digimer talk contribs created page HDD (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 Digimer talk contribs created page RAID (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 Digimer talk contribs created page Scancore (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...")
19:40, 15 August 2023 Digimer talk contribs created page ScanCore (Redirected page to Scancore) Tag: New redirect
19:14, 15 August 2023 Digimer talk contribs created page Intelligent Availability (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 Digimer talk contribs created page Anvil! (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 Digimer talk contribs created page UPS (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}}")

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