builds on top of the flat key-value store. © 2019 Cloudera, Inc. All rights reserved. 18 BUILDING BLOCKS Use proven technologies - don’t reinvent the wheel • RAFT replication – http://raft.github.io implementation of RAFT - Apache Ratis Library. • Storage Containers – Unit of replication (collection of blocks) ● RocksDB - container metadata • Supported by and battle-tested at Facebook. • OM – a namespace {Store Data Blocks In Containers} Container Container Storage Container Manager {Manage Containers, allocate blocks, certificates, datanodes} Container Container DataNodes {Store Data Blocks In Containers}

after each SQL query Use script delimiter after SQL block Keep SQL script delimiter after SQL script blocks (BEGIN/END) String escape character Character used to escape special symbols in strings Meta model 283 of 1171. Show quote as $$ Displays quotes as code blocks or strings. $$ Show $tagName$ quote as Displays quotes as code blocks or strings. $tagName$ Use prepared statements Uses prepared Security MySQL User Management Storage Engines InnoDB, MyISAM, MRG_MyISAM, Archive, Blackhole, CSV, Memory, Performance_schema Database Management MySQL Events MySQL Stored Procedures Additional features

after each SQL query Use script delimiter after SQL block Keep SQL script delimiter after SQL script blocks (BEGIN/END) String escape character Character used to escape special symbols in strings Meta model 283 of 1171. Show quote as $$ Displays quotes as code blocks or strings. $$ Show $tagName$ quote as Displays quotes as code blocks or strings. $tagName$ Use prepared statements Uses prepared Security MySQL User Management Storage Engines InnoDB, MyISAM, MRG_MyISAM, Archive, Blackhole, CSV, Memory, Performance_schema Database Management MySQL Events MySQL Stored Procedures Additional features

after each SQL query Use script delimiter after SQL block Keep SQL script delimiter after SQL script blocks (BEGIN/END) String escape character Character used to escape special symbols in strings Meta model 256 of 1010. Show quote as $$ Displays quotes as code blocks or strings. $$ Show $tagName$ quote as Displays quotes as code blocks or strings. $tagName$ Use prepared statements Uses prepared Security MySQL User Management Storage Engines InnoDB, MyISAM, MRG_MyISAM, Archive, Blackhole, CSV, Memory, Performance_schema Database Management MySQL Events MySQL Stored Procedures Additional features

free, fuzzy and bezier • Transformation tools such as rotate, scale, shear and flip • Tile-based memory management so that the image size is limited only by available disk space • Multiple undo/re-do as quite a few questions have been discussed on the lists already. The archive can be seen as a memory for the mailing lists expertise. 358 Chapter 9. Ubuntu Help and Support Ubuntu Desktop Course Copyright the other is known as "swap" which can be thought of as an extension to your computer's internal memory. Alternatively, it is possible to create multiple partitions of differing sizes into which different

and {% render_block "js" %} are Sekizai template tags that load blocks of HTML defined by Django applications. django CMS defines blocks for CSS and JavaScript, and requires these two tags. We recommended tag is included in the cms_tags library and will add the required CSS and javascript to the sekizai blocks in the base template. The template tag must be placed before any {% placeholder %} occurrences within models.pluginmodel.CMSPlugin.copy_plugins, which caused the original plugin object to be modified in memory. The fixed code leaves the original unaltered and returns a modified copy. Custom plugins that called

Requests 20 About Read Requests 21 Planning a Cassandra Cluster Deployment 22 Selecting Hardware 22 Memory 22 CPU 22 Disk 23 Network 23 Planning an Amazon EC2 Cluster 23 Capacity Planning 24 Calculating concurrent_compactors 72 concurrent_reads 72 concurrent_writes 72 flush_largest_memtables_at 73 in_memory_compaction_limit_in_mb 73 index_interval 73 memtable_flush_queue_size 73 memtable_flush_writers with the requested data; if multiple nodes are contacted, the rows from each replica are compared in memory to see if they are consistent. If they are not, then the replica that has the most recent data (based

eBay scale ■ Proxy config convergence time (CDS, EDS, LDS, RDS push times) ■ Resource usage (CPU, memory, etc.) ○ Secondary Goal ■ Fine-tune configuration params - debounce interval, push concurrency Testing: Results ● Default wide-open egress sidecar configuration does not scale ○ Results in high memory usage & convergence times since each sidecar knows about all services in the cluster ○ Disabled from single Pilot instance to 0 - 3,000 sidecars < 1 second ○ Pilot CPU & memory within acceptable limits: < 10 cores, 25 GB memory ○ Pilot can scale horizontally ● Need to tune PILOT_DEBOUNCE_AFTER, PILOT_DEBOUNCE_MAX

for inline components & workflows ○ Trust model augmentation ■ Impersonating ■ Secret clear in memory ■ Secret persistence ● Key protection ○ Private key for TLS ○ Signing key ○ … #IstioCon Performance ● CapEx, OpEx #IstioCon RDMA (Remote Direct Memory Access) ● Advance transport protocol (same layer as TCP and UDP) ● Main features ○ Remote memory r/w semantics in addition to send/receive ○ Kernel

count of outstanding deleters • Multiple instances of rcu_domain? Later... • And there is still memory_order_consume... 53 © 2021. 54 What Future Learnings Might There Be? • QEMU developers’ on deleters count of outstanding deleters • Multiple instances of rcu_domain? Later... • And there is still memory_order_consume... • None of which are on critical path to IS 54 © 2021. 55 Final Words 55 © 2021