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| 1 | +{:shortdesc: .shortdesc} |
| 2 | +{:new_window: target="_blank"} |
| 3 | + |
| 4 | +# Glossary |
| 5 | +*Last update: 2024/01/29* |
| 6 | + |
| 7 | + |
| 8 | +This glossary provides terms and definitions for Runtimes OpenJ9 ®. |
| 9 | +{:shortdesc} |
| 10 | + |
| 11 | +The following cross-references are used in this glossary: |
| 12 | + |
| 13 | +- *See* refers you from a nonpreferred term to the preferred term or from an abbreviation to the spelled-out form. |
| 14 | +- *See also* refers you to a related or contrasting term. |
| 15 | + |
| 16 | + |
| 17 | +<!--If you do not want letter links at the top of your glossary, delete the text between these comment tags.--> |
| 18 | + |
| 19 | +[A](#glossa) |
| 20 | +[B](#glossb) |
| 21 | +[C](#glossc) |
| 22 | +[D](#glossd) |
| 23 | +[E](#glosse) |
| 24 | +[F](#glossf) |
| 25 | +[G](#glossg) |
| 26 | +[H](#glossh) |
| 27 | +[I](#glossi) |
| 28 | +[J](#glossj) |
| 29 | +[K](#glossk) |
| 30 | +[L](#glossl) |
| 31 | +[M](#glossm) |
| 32 | +[N](#glossn) |
| 33 | +[O](#glosso) |
| 34 | +[P](#glossp) |
| 35 | +[Q](#glossq) |
| 36 | +[R](#glossr) |
| 37 | +[S](#glosss) |
| 38 | +[T](#glosst) |
| 39 | +[U](#glossu) |
| 40 | +[V](#glossv) |
| 41 | +[W](#glossw) |
| 42 | +[Z](#glossz) |
| 43 | + |
| 44 | +<!--end letter link tags--> |
| 45 | + |
| 46 | +## A |
| 47 | +{: #glossa} |
| 48 | + |
| 49 | + |
| 50 | +### AWT font subsystem |
| 51 | +{: #x10447151} |
| 52 | + |
| 53 | +The Abstract Window Toolkit (AWT) package in Java that is used to create graphical user interface applications. It contains classes that help to implement common windows-based tasks, such as adding scroll bars, buttons, list items, and text boxes. |
| 54 | + |
| 55 | +## C |
| 56 | +{: #glossc} |
| 57 | + |
| 58 | + |
| 59 | +### cryptographic acclerator |
| 60 | +{: #x10447156} |
| 61 | + |
| 62 | +The use of hardware to run cryptographic operations to improve performance. |
| 63 | + |
| 64 | +## D |
| 65 | +{: #glossd} |
| 66 | + |
| 67 | + |
| 68 | +### dump |
| 69 | +{: #x2021514} |
| 70 | + |
| 71 | +A capture of storage information at the time of an error. |
| 72 | + |
| 73 | +### dynamic logical partitioning |
| 74 | +{: #x10447168} |
| 75 | + |
| 76 | +Partitioning with the capability to logically attach and detach a managed system's resources to and from a logical partition's operating system without rebooting. |
| 77 | + |
| 78 | +## H |
| 79 | +{: #glossh} |
| 80 | + |
| 81 | + |
| 82 | +### heap dump |
| 83 | +{: #x2788665} |
| 84 | + |
| 85 | +A dump that shows the content of the Java heap. |
| 86 | + |
| 87 | +### heuristic |
| 88 | +{: #x2085115} |
| 89 | + |
| 90 | +A problem-solving method or algorithm used to derive a workable solution in within a reasonable time. |
| 91 | + |
| 92 | +### huge page |
| 93 | +{: #x4550512} |
| 94 | + |
| 95 | +In Linux, a block of memory that can be 2 MB or 1 GB in size. Using huge pages increases the kernel-level performance by creating fewer pages and therefore fewer mapping tables that the kernel has to load. |
| 96 | + |
| 97 | +## J |
| 98 | +{: #glossj} |
| 99 | + |
| 100 | + |
| 101 | +### Java dump |
| 102 | +{: #x8172135} |
| 103 | + |
| 104 | +A dump that contains information from the Java application, such as the operating environment, locks, threads, hooks, shared classes, and class loaders. |
| 105 | + |
| 106 | +## L |
| 107 | +{: #glossl} |
| 108 | + |
| 109 | + |
| 110 | +### large page |
| 111 | +{: #x10447162} |
| 112 | + |
| 113 | +In Windows, a block of memory that can be 2 MB or 1 GB in size. |
| 114 | + |
| 115 | +### logical partition (LP,LPAR) |
| 116 | +{: #x2002959} |
| 117 | + |
| 118 | +A function of an operating system that creates segments of resources that can be run on copies, or instances, of the operating system and associated applications. |
| 119 | + |
| 120 | +### LP |
| 121 | +{: #x2029334} |
| 122 | +See [logical partition](#x2002959). |
| 123 | + |
| 124 | + |
| 125 | +### LPAR |
| 126 | +{: #x2029338} |
| 127 | +See [logical partition](#x2002959). |
| 128 | + |
| 129 | + |
| 130 | +## O |
| 131 | +{: #glosso} |
| 132 | + |
| 133 | + |
| 134 | +### OpenSSL |
| 135 | +{: #x10447142} |
| 136 | + |
| 137 | +An open source version of the SSL and TLS security protocols, which provide encryption and server authentication over the internet. |
| 138 | + |
| 139 | +## P |
| 140 | +{: #glossp} |
| 141 | + |
| 142 | + |
| 143 | +### page |
| 144 | +{: #x2003565} |
| 145 | + |
| 146 | +A block of memory that equals 4096 bytes. |
| 147 | + |
| 148 | +## R |
| 149 | +{: #glossr} |
| 150 | + |
| 151 | + |
| 152 | +### release cadence |
| 153 | +{: #x10447137} |
| 154 | + |
| 155 | +The frequency at which new software updates or features are released to users. |
| 156 | + |
| 157 | +## S |
| 158 | +{: #glosss} |
| 159 | + |
| 160 | + |
| 161 | +### SDUMP |
| 162 | +{: #x2685105} |
| 163 | +See [system dump](#x2095425). |
| 164 | + |
| 165 | + |
| 166 | +### Secure Sockets Layer (SSL) |
| 167 | +{: #x2038004} |
| 168 | + |
| 169 | +A security protocol that provides communication privacy. With SSL, client/server applications can communicate in a way that is designed to prevent eavesdropping, tampering, and message forgery. |
| 170 | + |
| 171 | +### SSL |
| 172 | +{: #x2483907} |
| 173 | +See [Secure Sockets Layer](#x2038004). |
| 174 | + |
| 175 | + |
| 176 | +### system dump (SDUMP) |
| 177 | +{: #x2095425} |
| 178 | + |
| 179 | +A dump of all the storage in the system that can be used for problem determination. |
| 180 | + |
| 181 | +## T |
| 182 | +{: #glosst} |
| 183 | + |
| 184 | + |
| 185 | +### THP |
| 186 | +{: #x10447179} |
| 187 | +See [Transparent Huge Pages](#x10447174). |
| 188 | + |
| 189 | + |
| 190 | +### TLS |
| 191 | +{: #x2041643} |
| 192 | +See [Transport Layer Security](#x2069299). |
| 193 | + |
| 194 | + |
| 195 | +### Transparent Huge Pages (THP) |
| 196 | +{: #x10447174} |
| 197 | + |
| 198 | +An abstraction layer that is a Linux kernel feature for automating most parts of creating and managing huge pages. |
| 199 | + |
| 200 | +### Transport Layer Security (TLS) |
| 201 | +{: #x2069299} |
| 202 | + |
| 203 | +A set of encryption rules that uses verified certificates and encryption keys to secure communications over the Internet. TLS is an update to the SSL protocol. |
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