asteroza + cache   62

At the mercy of suppliers.
Radioactive RAM would be problematic, yes...
humor  history  Sun  UltraSPARC  radioactive  cache  RAM  heisenbug 
june 2019 by asteroza
[1901.01161] Page Cache Attacks
This is kinda bad, since it leverages software caches and can be hardware agnostic, allowing write once malware that works well all over (javascript?)
shadow  page  cache  side  channel  attack  exploit  security  hacking  pentesting 
january 2019 by asteroza
PrimoCache Overview
Sorta like windows storage spaces pools, sorta ZFS-ish
windows  software  storage  accelerator  cache  caching 
february 2018 by asteroza
DNSFS. Store your files in others DNS resolver caches
Abusing DNS resolver caches to store data, note PingFS is also a thing...
DNS  DNSFS  filesystem  TTL  cache  software  humor 
january 2018 by asteroza
Alluxio – A Memory-Centric Virtual Distributed Storage System
It sounds sorta like they implented a distributed cache/storage broker, where the local node runs something similar to ZFS/ZIL/L2ARC, with final external persistent storage tier connected as a plugin.
Alluxio  tachyon  virtual  distributed  cache  caching  sotrage  layer  software  broker  in-memory  memory  accelerator  opensource  Delicious 
february 2016 by asteroza
DalvikTheDalek comments on Have Time Warner Internet but can barely stream YouTube? I did an experiment.
Apparently some third party video CDN's are slow, so blocking them outright tends to cause youtube and some other streaming video sites to fail over to origin servers. This thread has some IP ranges you should do firewall rejects for.
streaming  networking  firewall  cache  CDN  performance  rule  block  YouTube  video  network  Delicious 
august 2013 by asteroza
Path: engineering insights - how we built messaging
Engineering article on using XMPP/ejabberd for realtime messaging, but instead of the inbuilt database with ejabberd, they swapped in an API caching layer linking to mongoDB, plus some protocol enhancements to reduce client fetches.
jabber  client  cache  communication  ejabberd  XMPP  layer  architecture  chat  engineering  API  software  realtime  service  MongoDB  cloud  messaging  server  design  Delicious 
august 2013 by asteroza
Justifying FS-Cache [LWN.net]
FS-Cache seems to have been merged into the 2.6.30 kernel so is available for NFS systems. Somebody ought to make a nice little VMware VM appliance to grab local RDM SSD's for FS-Cache to grab external NFS shares, then refeed that to the VMware host server as a local NFS datastore. Though that Marvel Dragonfly hardware accelerator which links directly into VMware drivers is probably faster (though less generic).
FS-Cache  network  filesystem  local  cache  caching  accelerator  software  linux  kernel  patch  NFS  CIFS  Delicious 
september 2011 by asteroza
facebook/flashcache - GitHub
Based on dm-cache and in production at Facebook. Bcache is architecturally superior but less mature. Kernel module for SSD caching of IO
flashcache  dm-cache  software  caching  cache  accelerator  facebook  programming  development  storage  SSD  Delicious 
september 2011 by asteroza
Bcache - BcacheWiki
Interesting work on a filesystem agnostic block device cache implementation using SSD's, as a linux kernel patch. Very similar to ZFS' L2ARC cache which is also intended for use with SSD's. But the big difference is that this is a read/write cache, so technically it is a hybrid of ZIL and L2ARC. Creator works for Google, so this might have legs...
Bcache  linux  kernel  patch  software  block  device  caching  accelerator  writeback  SSD  ZFS  L2ARC  ZIL  programming  development  performance  storage  cache  filesystem  Delicious 
september 2011 by asteroza
Making ZFS faster… | Alexander Leidinger
Using a cheapish USB stick for ZFS L2ARC on an EHCI connected USB port is ghetto but tenable...
ghetto  ZFS  L2ARC  cache  EHCI  USB  SSD  storage  flash  disk  sysadmin  tips  tricks  Delicious 
september 2011 by asteroza
MB882HX-1SB_Other SSD Related Product_SSD KIT_ICY DOCK manufacturer Removable enclosure, Screwless hard drive enclosure, SAS SATA Mobile Rack, DVR Surveillance Recording, Video Audio Editing, SATA portable hard drive enclosure
Simple little inline SATA caching solution, using a special controller to trick the OS into thinking it has a SSD that is double the size of the physical SSD, backed by the HDD, which loses that double amount from it's size.
SSD  HDD  hard  disk  hybrid  expander  hardware  devices  SATA  3.5inch  2.5inch  3.5  2.5  adapter  inline  cache  storage  Delicious  electronics 
august 2011 by asteroza
Marvell Launches New DragonFly Virtual Storage Accelerator [SNW Spring 2011] | StorageReview.com
This appears at first glance to be a server local caching card that uses local SSD's, with drivers that hook into the hypervisor's network storage drivers (probably iSCSI, maybe NFS) as a transparent network storage caching layer local to a hypervisor, reducing network IO. Which is an interesting way towards boosting speed, since many VM servers using network storage have idle/empty storage slots onboard.
marvell  Dragonfly  virtual  storage  accelerator  card  PCIe  PCIexpress  x8  network  iSCSI  SAN  hardware  electronics  devices  cache  caching  VMware  linux  KVM  Xen  XenServer  Hyper-V  SAS  SATA  hypervisor  machine  server  VM  acceleration  Delicious 
august 2011 by asteroza
Performance & Security for Any Website | CloudFlare | Home
Was an inline web security proxy/load balancer startup that accidentally turned into CDN (due to tremendous optimization and and anycast edge caching techniques) and discovered some tricks to fiddle with client content to hide it from spambot trawling (like inline replacement of email addresses with a short javascript string, or adding third party services such as Google Analytics to content without modifying the origin content, or even inline feeding of third party widgets via keepalive session extension). They handle double digit amounts of world web traffic apparently.
CloudFlare  CDN  anycast  edge  cache  content  optimization  web  security  obfuscation  spambot  antitrawling  rewrite  Delicious 
june 2011 by asteroza
ZFS with Cloud Storage or Faraway Storage - Jignesh Shah's Weblog
Cool idea of using ZFS ZIL/L2ARC on local storage (preferably on fast local storage tiers like SSD's, but if the scale of data is too large you may have to go back to spinning disk) to provide low latency random local writes, while flushing acceptable high latency bulk writes out to a final cloud based iSCSI tier, and using a local read cache to overcome the seek/latency hit of remote iSCSI storage (assuming your cache is filled well).

Pushing the idea farther, Use Amazon EC2 and S3, store main partitions as files in S3 and use EC2 instances to export iSCSI LUN's of those backing files.
ZFS  ZIL  L2ARC  iSCSI  fast  low  latency  local  cache  storage  tier  remote  cloud  OpenSolaris  SSD  mixed  hybrid  SAN  postgresql  performance  sysadmin  tips  tricks  system  architecture  database  Delicious 
april 2010 by asteroza
Vanish Installation and Configuration
A system that uses a p2p network to store ephemeral encryption keys, so that an encrypted message can be decrypted within 8 hours of encryption, else the keys are lost forever. This obviously does not prevent someone from saving a plaintext copy of the decrypted message, but for practical purposes this is a self destructing message. I suppose if someone tried really hard, they could try to collect all keys from the network constantly and time reference them, then try a brute force attack using a limited key set.
Vanish  java  p2p  distributed  encryption  key  forward  secrecy  firefox  plugin  vuze  hash  table  cache  selfdestruct  message  security  privacy  anonymous  Delicious 
july 2009 by asteroza
hashcache.pdf (application/pdf Object)
This hurts my head because, in a way, this is so simple and awesome. Use a specialized/tweaked hashing algorithm to generate the actual hard disk location of the cached webpage (hash the URL into a filepath for example). Skips the index lookup stage so obviates the need for a web cache index. I wonder if you can do filesystem tricks like altering the create time to match the web server's file age response, so that doing a cache file age check is a compare.
hashcache  edgeXL  web  cache  proxy  indexless  software  algorithm  research  programming  development  webdev  high  performance  caching  WAN  HTTP  accelerator  server  filetype:pdf  media:document  Delicious 
april 2009 by asteroza

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