User contributions for Digimer
Jump to navigation
Jump to search
- 02:37, 16 August 2023 diff hist +3,613 N Boolean Algebra Created page with "{{header}} ''' Boolean Algebra ''' These are the various 'logic gates' used to create all computer logic. At their core, they are all made up of the 'NAND' gate. = Logic Gates = : Logic gates can be represented by showing two input lines and one output line followed by a table showing what electrical/binary state the inputs must be in to effect a certain output state. In these 'Truth Tables', the two inputs are represented as inputs 'A' and 'B', and the output is..." current
- 02:36, 16 August 2023 diff hist +2,012 N Write-back caching 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..." current
- 02:34, 16 August 2023 diff hist +403 N MN Created page with "{{howto_header}} '''MN''' is an acronym for "Migration Network". In Anvil! clustering, this is the optional (but recommended) subnet used for copying a server's RAM during a live-migration. This is generally connected back-to-back between the two subnodes in an Anvil! node. This is done to allow for maximum bandwidth and minimal latency to facilitate as fast as possible live migrations. {{footer}}" current
- 02:27, 16 August 2023 diff hist +354 N SN Created page with "{{howto_header}} '''SN''' is an acronym for "Storage Network". In Anvil! clustering, this is the subnet used for storage network traffic. Specifically, this is used for the DRBD replication traffic. Given the large amount of bandwidth needed for replicated storage, it is generally a good idea to use this network for no other purpose. {{footer}}" current
- 02:26, 16 August 2023 diff hist +324 N BCN Created page with "{{howto_header}} '''BCN''' is an acronym for "Back-Channel Network". In Anvil! clustering, this is the subnet used for inter-node cluster communication as well as other non-storage related cluster network traffic. It should be completely isolated from any networks exposed to the internet for security reasons. {{footer}}" current
- 02:24, 16 August 2023 diff hist +464 N IFN Created page with "{{howto_header}} '''IFN''' is an acronym for "Internet-Facing Network" (or "Intranet-Facing Network"). In Anvil! clustering, this is the subnet used for all untrusted network traffic. Generally, as the name implies, this network has access to the Internet or other untrusted networks. No cluster or storage related traffic should use this network. This is the network used for all traffic to and from the servers hosted on the Anvil! cluster nodes. {{footer}}" current
- 02:22, 16 August 2023 diff hist +265 N YB Created page with "{{header}} SI base2 notation for <span class="code">yottabyte</span>s. * YB = yottabyte (10^24 / 1,000,000,000,000,000,000,000,000 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}" current
- 02:22, 16 August 2023 diff hist +261 N ZB Created page with "{{header}} SI base2 notation for <span class="code">zettabyte</span>s. * ZB = zettabyte (10^21 / 1,000,000,000,000,000,000,000 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}" current
- 02:22, 16 August 2023 diff hist +255 N EB Created page with "{{header}} SI base2 notation for <span class="code">exabyte</span>s. * EB = exabyte (10^18 / 1,000,000,000,000,000,000 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}" current
- 02:21, 16 August 2023 diff hist +252 N PB Created page with "{{header}} SI base2 notation for <span class="code">petabyte</span>s. * PB = petabyte (10^15 / 1,000,000,000,000,000 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}" current
- 02:21, 16 August 2023 diff hist +248 N TB Created page with "{{header}} SI base2 notation for <span class="code">terabyte</span>s. * TB = terabyte (10^12 / 1,000,000,000,000 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}" current
- 02:21, 16 August 2023 diff hist +244 N GB Created page with "{{header}} SI base2 notation for <span class="code">gigabyte</span>s. * GB = gigabyte (10^9 / 1,000,000,000 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}" current
- 02:20, 16 August 2023 diff hist +240 N MB Created page with "{{header}} SI base2 notation for <span class="code">megabyte</span>s. * MB = megabyte (10^6 / 1,000,000 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}" current
- 02:20, 16 August 2023 diff hist +236 N KB Created page with "{{header}} SI base2 notation for <span class="code">kilobyte</span>s. * KB = kilobyte (10^3 / 1,000 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}" current
- 02:19, 16 August 2023 diff hist −206 Base2 Redirected page to Base-2 current Tag: New redirect
- 02:19, 16 August 2023 diff hist +21 N Base10 Redirected page to Base-10 current Tag: New redirect
- 02:18, 16 August 2023 diff hist +265 N YiB Created page with "{{header}} IEC base2 notation for <span class="code">yebibyte</span>s. * YiB = yebibyte (2^80 / 1,208,925,819,614,629,174,706,176 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}" current
- 02:18, 16 August 2023 diff hist +261 N ZiB Created page with "{{header}} IEC base2 notation for <span class="code">zebibyte</span>s. * ZiB = zebibyte (2^70 / 1,180,591,620,717,411,303,424 bytes) See the following article for a fill list of IEC and SI data size notations: * IEC and SI Size Notations {{footer}}" current
- 02:18, 16 August 2023 diff hist +256 N EiB Created page with "{{header}} IEC base2 notation for <span class="code">exbibyte</span>s. * 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}}" current
- 02:17, 16 August 2023 diff hist +253 N PiB Created page with "{{header}} IEC base2 notation for <span class="code">pebibyte</span>s. * 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}}" current
- 02:17, 16 August 2023 diff hist +247 N TiB Created page with "{{header}} IEC base2 notation for <span class="code">tebibyte</span>s. 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}}" current
- 02:16, 16 August 2023 diff hist +241 N MiB Created page with "{{header}} IEC base2 notation for <span class="code">mebibyte</span>s. * 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}}" current
- 02:16, 16 August 2023 diff hist +237 N KiB Created page with "{{header}} IEC base2 notation for <span class="code">kibibyte</span>s. * 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}}" current
- 02:15, 16 August 2023 diff hist +1,545 N 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 = <span class="text"> IEC Notation Size -------------- --------------------------------..." current
- 02:15, 16 August 2023 diff hist +226 N 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 diff hist +243 N GiB Created page with "{{header}} IEC base2 notation for <span class="code">gibibyte</span>s. 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}}" current
- 02:14, 16 August 2023 diff hist −7 Selecting Hardware For Your Anvil! →Serial Access current
- 01:55, 16 August 2023 diff hist −5 TLUG Talk: Storage Technologies and Theory current
- 01:55, 16 August 2023 diff hist +50,369 N 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'''''<br /> '''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 diff hist +2,012 N 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..." current
- 01:54, 16 August 2023 diff hist +428 N 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}}" current
- 01:53, 16 August 2023 diff hist +257 N 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]. current
- 01:52, 16 August 2023 diff hist +248 N 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]. current
- 01:50, 16 August 2023 diff hist +2,778 N 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..." current
- 01:47, 16 August 2023 diff hist +1,180 N 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] [..." current
- 01:41, 16 August 2023 diff hist +220 N 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]. current
- 01:40, 16 August 2023 diff hist +224 N 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]. current
- 01:39, 16 August 2023 diff hist +228 N 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]. current
- 01:38, 16 August 2023 diff hist +30,678 N 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 diff hist +161 N Gluster Created page with "{{header}} See: http://www.gluster.org/docs/index.php/GlusterFS<br /> See: http://www.gluster.org/<br /> See: http://en.wikipedia.org/wiki/GlusterFS {{footer}}" current
- 01:23, 16 August 2023 diff hist +478 N 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}}" current
- 00:45, 16 August 2023 diff hist −18,469 Scancore →Scan Agents current
- 23:58, 15 August 2023 diff hist −2 Scancore →Example 1; Overheating
- 23:55, 15 August 2023 diff hist +18 Generate 8bit dec to hex to bin chart.pl current
- 23:54, 15 August 2023 diff hist +1,362 N 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 diff hist +246 N 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}}" current
- 23:52, 15 August 2023 diff hist +226 N 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}}" current
- 23:51, 15 August 2023 diff hist +78 N Hex Created page with "{{header}} The term '''Hex''' is a short form of Hexadecimal. {{footer}}" current
- 23:51, 15 August 2023 diff hist +687 N 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..." current
- 23:50, 15 August 2023 diff hist +8,623 N 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..." current
