cache for centrally-managed shared storage. â« Implements a block-oriented cache; write-through to ... Windows XP deskt
Aug 12, 2015 - Matt Bishop is a Professor in the Department ... Natalie C. Ebner is an Assistant ..... [3] S. Peter, J. Li, I. Zhang, D. R. K. Ports, D. Woos, A. Krish-.
isfy rules that enforce selective downgrading [22,. 26] and ... Bob, Dave ; Alice â }, the confidentiality policy ... Bob, or Dave; clearly, Bob is one such principal.
Oct 6, 2014 - vice quality. The growing popularity and diversity of ...... Existing work leverages Linux containers [13]
time, calculated as the amount of time it took to return a ... better than the Python matrix queries (8x), PMGD per- ... In the figure, python matrix, memsql, and.
Robert Beck. THE ADVANCED ... Robert Beck – University of Alberta.
ABSTRACT ..... we are able to catch and proxy IMAP [4] protocol connections to
our central ...
M.Ranganathan, Marc Bednarek, Fernand Pors, and Doug Montgomery. THE ADVANCED .... the string âI am at 1â to the console at Site 1 (#d in Fig- ure 2).
service performance of HTTP and HTTPS Web servers. The evaluation results ..... the anonymous reviewers for their numerous helpful comments. This work ... A., AND CAO, P. Pro- viding differentiated levels of service in web content hosting.
â¢Aggregated, large backup files. Replicate for disaster recovery. Bypass. More limited ... Depends on data change rate, backup pattern, and retention policy.
Linux (detailed later in the paper) and are adminis- .... fic monitoring tools are for watching current traffic .... need for better intrusion detection and prevention.
Recent highly publicized benchmarks have suggested that Linux systems do not scale as well ... Many traditional web server benchmarks have focused on improving .... kernel, so state doesn't have to be passed in during .... /dev/poll implementation to
Aug 18, 2017 - unfettered software access to energy management hard- ... We provide background on DVFS and its associate
Apr 11, 2018 - performance OS bypass software packet processing path. CPU-intensive per packet .... visions networking,
Oct 6, 2014 - Over the past decade, remarkable strides have been made in expanding virtualization ... The big disadvanta
Table 1: Partial List of Unsafe Functions in the Standard C Library jump
instruction) may ... Figure 2: A Sample Program to Demonstrate a Stack
Smashing Attack.
â¢DNSSEC adds this using digital signatures. â¢DNSSEC has two perspectives: âDomain owners sign their zone and publi
Observation 1: uTorrent achieves on average 16% higher download speeds
compared to Vuze. ▫ Observation 2: We indentify four implementation differences
.
Email: [email protected] ... ABSTRACT. NetReg is an automated system that requires an unknown DHCP client to register their .... are sent to a Perl CGI script.
Fred Douglis and Michael Rabinovich. AT&T Labs â ... Fred Douglis y. AT&T Labs â ...... [14] S. Williams, M. Abrams, C. R. Standridge, G. Ab- dulla, and E. A. Fox ...
[11] Bavier, Andy, Mic Bowman, Brent Chun, Scott. Karlin, Steve Muir, Larry Petersen, Timothy. Roscoe, Tammo Spalink, Make Wawrzoniak,. ''Operation System ...
quires a reboot or application restart. ... showing how it transforms HTML and JavaScript using a .... specific filtering function as a policy and apply it to all.
Rules. Components. List. Sequencer. Execution. Example : sequencer softstop colddoor[1-3] rack[4-5] compute[100-200] ..... Taken from the open-source python-graph library (Google). - Checking and Modifications by hands possible. - Output a .... ISE u
Oct 6, 2014 - cisions in a distributed manner, utilizing global cluster information via a loosely coordinated mechanism.
handled by Mercury). Desktop traces iozone. â« iozone run directly against server. iSCSI volume and via Mercury cache.
Mercury: host-side flash caching for the datacenter Steve Byan, James Lentini, Luis Pabón, Christopher Small, Mark W. Storer
Shared-pool datacenter
+
FCoE/iSCSI/NFS/CIFS
Shared VM servers Shared Storage No persistent state Unified central storage VMs not tied to servers, management can be dynamically Shared pool scales more added, moved easily; resources can be Servers can be added, reassigned on-the-fly upgraded, repurposed Data can be moved to on-the-fly most appropriate media
Integrated flash memory 10s-100s GB of flash being integrated into servers New price/perf tier between disk and DRAM Flash is 10-100x faster than disk, ¼ price of DRAM High IO-per-second (IOPS) storage close to CPU …but using integrated flash for primary storage breaks the shared-pool datacenter model Binds software services to specific servers Puts flash primary storage out of reach of storage management tools
Mercury flash cache implementation Mercury portable flash cache Uses integrated flash or other local storage as a cache for centrally-managed shared storage Implements a block-oriented cache; write-through to maintain coherence with backing store Deployable as - Hypervisor filter driver, transparent to guest OS - OS filter driver, transparent to applications - Application cache - Proxy cache for a network storage protocol Prototype deployment KVM/QEMU block driver, loads into stock QEMU Provides new disk format, hg Requests sent to hg device handed to SSD cache or passed to raw backing device
Linux Guest VM KVM/QEMU virtio paravirtualized device QEMU virtual disk open
close
aioread
aiowrite
hg Mercury caching block filter driver open
close
aioread
aiowrite
open
close
raw block driver disk-under-test open
close
aioread
aioread
aiowrite
raw block driver flash SSD aiowrite
open
close
aioread
aiowrite
POSIX syscalls through Linux-KVM hypervisor host iSCSI volume
iozone iozone run directly against server iSCSI volume and via Mercury cache Serial I/O showed small improvement Random I/O had substantial speedup (almost all reads handled by Mercury)
