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Ultimate ZFS Overview | TechSNAP 28

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Coming up on this week’s TechSNAP…

Buckle up and prepare for our Ultimate ZFS overview!

Plus, the next generation of Stuxnet is in the wild, but this time is laying low, collecting data.

All that and more, on this week’s TechSNAP!


Direct Download Links:

HD Video | Large Video | Mobile Video | MP3 Audio | OGG Audio | YouTube

Subscribe via RSS and iTunes:

Show Notes:

Jupiter Broadcasting Gear

http://www.printfection.com/jbgear

  • Coupon Code: SuperDuperShip – Free Shipping on Super Saver, International, and Canadian Airmail orders. No minimums
  • Coupon Code: SuperSave$10 – $10 off orders with a subtotal of $50+
  • Coupon Code: Scary35% – 35% off orders with a subtotal of $100+

Next generation of Stuxnet seen in the wild?

  • Called Duqu, the malware appears to be based on the same concepts as Stuxnet, and likely was written by some of the same people, or someone with access to the Stuxnet source code.
  • The malware is designed to be stealthy and silent, rather than exploiting the system to some gain, like most malware
  • The rootkit loads it self as a validly signed driver. It appears to have been signed by the certificate of a company in Taiwan identified as C-Media Electronics Incorporation. It is possible that their systems were compromised and their private key is being used without their knowledge. The certificate was set to expire on August 2, 2012, but authorities revoked it on Oct. 14
  • The malware is not a worm, as it does it spread, and has no destructive payload
  • It appears to only gather intelligence and act as a espionage agent, collecting data to be used a future attack.
  • Analysts claim it appears to be seeking information on an unidentified industrial control system
  • Duqu appears to have been in operation, undetected for more than a year
  • Symantec has declined to name the countries where the malware was found, or to identify the specific industries infected, other than to say they are in the manufacturing and critical infrastructure sectors
  • Duqu analysis paper

Google switching to SSL for logged in users’ searches

  • Users who do a search while logged in, will do the search over SSL, meaning their search query and the results will be protected from snooping by their ISP, Government, Law Enforcement and WiFi hackers.
  • This is an important step as google works to personalize your search results more and more.
  • An interesting side effect of this is that browsers do not pass referrer headers when you transition from an SSL site. So the sites you visit from the search results page will no longer see what your search query was. Clicks on Adwords and other sponsored links will still pass your search query.
  • The primary impediment to SSL for everything is performance, encrypting all traffic on the web would require a great deal more hardware. This is why Google defaults to a weaker encryption for things like search results, than what online merchants typically use.
  • Another impediment to SSL is the certificate system, typical setups require a unique IP for each SSL certificate (because the name based virtual hosting typically done by web servers relies on an HTTP header, that is not sent until after the encryption session is started). However modern browsers and web servers support ‘SNI’ (Server Name Indication) to allow that information to be passed as part of the initial encryption setup. There are also solutions such as wildcard certificates (ie, *.google.com) and Unified Communications Certificates (UCC, typically used for MS Exchange servers and the like).
  • Google will also provide website owners with the top 1000 search queries that lead visitors to their site via Google Webmaster Tools.
  • HTTPS Everywhere | Electronic Frontier Foundation

Feedback:

ZFS Segment

  • This week we will be taking a look at ZFS as a storage solution
  • ZFS was originally developed by Sun Microsystems to be able to store a zetta byte of data (A zetta byte is equal to 1 billion tera bytes)
  • ZFS is both the Volume Manager and the File System. This gives it some unique benefits, including the ability to increase the size of the file system on the fly and improves performance for the ‘scrub’ (integrity check all data) and resilver (recover from a failed disk) operations, as only data blocks that are actually in use need to be rewritten, whereas a hardware RAID controller must resilver the entire disk because it is unaware of the file system.
  • ZFS is a ‘Copy-On-Write’ file system, this means that data is not immediately overwritten when it is changed
  • Features
    • Multiple mount points – You can create various mount points from the same storage pool, allowing you to have different settings for different types of files.
    • Passive Integrity Checking (Fletcher Checksum or SHA–2) – As data is read, it is compared against the checksum (or hash, depending on settings). If the data is found to be corrupted, ZFS attempts to recover it (from a mirrored device, RAID Z, or copies). This feature allows ZFS to detect silent corruption that normally goes unnoticed.
    • RAID Z – RAID Z works very similar to RAID 5, except without the requirement for a hardware RAID controller. RAID Z2 provides two parity drives, like RAID 6. Recently, RAID Z3 was also introduced, using 3 drives for parity, providing exceptional fault tolerance.
    • Compression – Allow you to compress the data stored in this mount point (defaults to lzjb for speed, or you can choose a specific level of gzip). This can be great for storing highly compressible information such as log files
    • Deduplication – Since ZFS already knows the hash of your files as it writes them, it can detect that a file with the identical content already exists in your storage pool, and it will simply link the new file to the old one, and because ZFS is copy-on-write, if either file changes, it does not effect the other. ZFS also supports an optional ‘verify’ setting, where even if the checksum/hash matches, it will do a byte-by-byte verification to ensure the files are the same, to avoid a cache collision resulting in data corruption, even though the chances of this happening are around 10^–77. Deduplication uses a lot of ram, so it is recommended that you only use it on datasets where there is a high probability of duplication (It requires 320 bytes per block, meaning 1TB of data in 8kb blocks requires 32GB of ram. ZFS allows blocks up to 128kb). Deduplication will only use up to 25% of ARC memory, after that performance is degraded.
    • Purposeful Duplication (Copies) – Allows you to ask ZFS to maintain more than 1 copy of each file in a mount point. This is in addition to any redundancy provided by mirrors/RAID Z etc. Where possible the additional copies are stored on different physical devices. This allows you to get the benefit of a system like RAID Z but only for a specific set of data, while using regular striping for the rest, to maximize your storage capacity. (The ‘Copies’ system was not designed to protect against entire drives failing, just the loss of specific sectors, also this setting only effects newly created files, so you should set it when you create the mount point)
    • Snapshots – A read only copy of the file system from a specific point in time, great for backups etc.
    • Clones – A writable snapshot. Allows you to create a second copy of the file system that shares all of the same disk space, and any changes to either the original or the clone get saved separately.
    • Dynamic Striping – As you add more disks to your ZFS pool, the strips are automatically adjusted to take advantage of the write performance of all available disks.
    • Space Reservation – Since all mount points share the same pool of free space, you can set reservations to make sure specific mount points always have access to free space, even if another mount point is trying to use all of the space.
  • In summary, ZFS can be a great solution for your home file server, as it allows you the flexibility to add additional storage at any time, deduplicate files, provided limited redundancy without needing RAID and can even provide some Drobo like functionality.
  • If you keep at least one SATA port available in your file server, you can replace smaller devices by attaching the newer drive, and using the ‘zpool replace’ command, to copy all of the data to the new device, then remove the smaller one. You can eventually replace every device in the system this way, and the storage pool sizes up automatically.
  • RAID Z pools cannot currently have devices added to them, although this feature is in the works. If you create a RAID Z (or Z2/Z3) pool, you can still increase it’s storage capacity by replacing each disk one at a time, and waiting for it to resilver (unlike in non-redundant setups, you do not have to connect the new device before removing the old one). Again, because ZFS is both the Volume Manager and the File System, the resilvering process is faster, because only data that is actually in use needs to be written to the new device.

Round Up:

Khitomer According to Us | STOked 88

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We’re back with part three of our STF guide, this time we arm you with our tips and tricks to beat STO’s Khitomer Accord Special Task Force!

Plus we’ll cover the latest changes in Season 4, the latest with the Enterprise F, and spend some love coins on the Klingons this week!

And much, much more!

Direct Download Links

HD Video | Large Video | Mobile Video | MP3 Audio | OGG Audio | YouTube

Subscribe via RSS and iTunes:


Our STOked App:

STOked App Grab the STOked iPhone/iPod App and download STOked on the go!


Show Notes:

NEWS:

Community Event: KDF Awareness Week
A week-long push for higher active population on the KDF side of the fence.
Tutors available in zone chat. Missions, Ship discussions, etc etc.
Group leaders/members for whatever you need ran. (maybe not STFs…)

KDF auto-decloak has been fixed!

Salami Inferno:

“The fix for this issue is not as simple as it sounds. It involves touching every single map in the game, which is a ridiculously high number.

That being said, we did it and the fix will be in the next tribble push.”

The new Diplomatic Immunity
(Since DSEs no longer pull you in)
Tentatively, it allows Feds to enter the KDF home sector
This opens up new assignments in the Doff system, since it’s location-based
KDF will have a similar ability available. No word on how you earn it (no Diplomacy).

Part 2: DTNE Dev Diary
CapnLogan pops in to answer a few questions…

Season 4 Update:

  • Players can now create a private PvE queue lobby
  • The borg are adapting to players too infrequently, resistance will be futile again very soon.

TWEET LEAKS:
CrypticEQAH: “Quick look at the new borg adaptation visual FX. Hope you brought a remodulator!” http://yfrog.com/z/kh1alyj
Gozer: “Updated Infected Boss Room.. New Shields animate around the generator and consoles..” http://twitpic.com/5gct8e
Gozer: “New “Normal” Mode Infected Boss Room… Walkways added for the Jumping “impaired” :) .. No walkways however on Elite”  http://twitpic.com/5f94tz/full
(ALSO WHAT HAPPENED TO OUR ALCOVES?!)

Star Trek Captain meet up in “The Captains”

KHITOMER ACCORD:

Don’t expect to be able to destroy the place JUST because you read a guide, or get tips. You need good gear, good specs, knowledgable players, and PRACTICE. But we’ll give you what help we can!

I’ve heard of skilled teams completing this entire mission in <1.5 hours, but the standard for even experienced groups seems to be between 2 and 3 hours, depending on a lot of various factors. To be safe, allot yourself 4 solid hours of gameplay, or be prepared to have an assigned break at some point, agreed-upon by your entire team.

MOIST walkthrus: http://www.youtube.com/watch?v=iMnx7IPi_Ck
Sanctuary of Wanderhome Guides: http://www.youtube.com/watch?v=MlaHzeZbZA4

Space – Two Gates
Both will activate as soon as you kill the last of the baddies that start at the center.
- Kill all except the Tac Cube, and draw it toward one of the two gates.
- Kill the Tac Cube on top of one of the gates, to get a nice boost to its damage from the cube’s warp core explosion.

  • After the two gates are active, you will need to destroy BOTH simultaneously, while also fending off waves of drones and spheres.
    • If you let 6 probes reach the central structure, you FAIL and the universe implodes.
  • You must have sufficient DPS to split your team into two groups, and one of those groups must be capable of BOTH clearing the spawns AND killing the gate.
    • The other half of the team only has to be able to kill the spawns, and the gate is an added bonus.
    • Once you destroy one gate, you can work together on the other if necessary.
    • Once one gate drops, Cubes are added to the spawns of the remaining gate.
      • If you can manage it, keep a Cube alive until the next wave and use its Warp Core as a weapon against gate/spawns.
  • Gravity Well, Tractor Beam Mines, Tractor Beam Repulsors, Photonic Shockwave (hold Probes in place, or push AWAY from central gate).
  • Tricobalt Mines!

3 minutes between waves of Borg, each time with 15 seconds of vulnerability.

Ground – Phase 1 (clearing)
Usual tactics:
Observe the kill order (Nodes first)
- Some nodes are very cleverly hidden on this map. A few even require diversionary tactics to reach (pulling the borg team THEN sending in a Sniper to eliminate the Node).
Expose/Exploit
- Might as well practice now, this will become even more crucial when the Borg start adapting more.

Borg are not in place, they beam in. Don’t send scouts, advance together and cautiously.
Best if you have at least one team member that knows the spawns/nodes.

Ground – Phase 2 (forcefield room, split team)

  • Endurance Team stays in the room with 6 nodes, and deactivates the shields.
    • The Borg that will spawn in this chamber are relatively wimpy.
    • Each shield node corresponds to a node in the main room you came from.
  • DPS Team stays in the main chamber and targets the nodes, as the shields drop (by other team)
    • You only have 3-4 seconds to drop the node before the shield reactivates, THEN you have to clear out the Borg that spawned in. THIS IS A DPS RACE.

After deactivating the 6th Node, you’ll be assaulted by dozens and dozens of borgs, including some Elite Tacticals that seem especially beefy. This is an endurance test, not a DPS race. STAY ALIVE.

Destroy the two “IMR Chambers” (top floor, and bottom floor)
Before destroying them, you can step inside to earn your Borg Sci Boff and an Accolade.
Step in SLOWLY, and a groupmate can rez you.

BOSS ROOM!
Poke in and kill the nodes first, then clear his buddies, then DPS him down.
Seal off the entry with Force Domes / Cover Shields, to prevent flanking.
He’s resilient, but doesn’t hit any harder than an Elite Tactical.

Space – Boss Battle
Step 1 – beat up Scimmy
Step 2 – destroy massive wave of Probes
Step 3 – CLICK FOLLOW

  • You may have to find a way to drop Red Alert, in order to be able to follow. My team managed this by using a Photonic Fleet to destroy the last few probes, while we retreated.
  • If you do not CLICK FOLLOW, you may be left behind and unable to participate in the next encounter. It’s not an actual map transfer, and there’s an invisible wall blocking you from manually travelling to the next area.

Be prepared for a lengthy battle against the final Space Boss.

  • Her CLOAK cannot be counter-acted, so just suck it up.
  • Keep your Evasive Maneuvers active to avoid the Thalaron Cannon, if you can.
    • A decent stack of resist buff can also turn it into a Thalaron Tickler (Hazard Emitters, Aux to SIF, Brace for Impact)
      • Extend Shields / Emergency to Shields
  • Good idea to have a skilled Gravity Well, can suck in groups of Probes to cause chain explosions.
  • Tractor Beam can also come in handy, as the boss likes to run away. Won’t cancel her Cloak, but may keep her nearby while she’s uncloaked. Some guides say toss this power, others say use it. Looks like a matter of taste.

Written by chris

June 28th, 2011 at 6:00 am

Sure-Fire Cure | STOked 86

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In our second of three STF Tips & Tricks episodes, the boys will rampage through “The Cure” with the aid of our fearless teammates from Jupiter Force. How do you outsmart the Borg’s shield generator puzzles? Find out what worked for us!

And then… Season 4 is here! Or is it? The first of the major features landed BRIEFLY on the Tribble Test Server this week, and we’re here to go over the patch notes with a fine-tooth comb. We’ll also pick out the juiciest details from the June “Ask Cryptic,” and announce a couple community-driven projects that have caught our eye.

Direct Download Links

HD Video | Large Video | Mobile Video | MP3 Audio | OGG Audio | YouTube

Subscribe via RSS and iTunes:


Our STOked App:

STOked App Grab the STOked iPhone/iPod App and download STOked on the go!


Show Notes:

Big Tribble Patch!
Ground Combat! (pic from Gozer)
Qonos!
New Gorn!
Tons of kit power changes!
On-Demand Patching!
PvE Queue system!
VIVOX!
Bug Fixes, Balance Tweaks, Feature Fixes, Foundry Improvements!

Ask Cryptic

  • Purchasing “random lots” of Doffs from the C-Store
  • More remastery will come, but for now “STFs are in far worse shape, and in need of love.”
  • Fleet Action changes — joining queues, private actions (without level banding restrictions)
    • Splitting Ground and Space FA dailies.
  • Ent-F will be a playable ship at some point during S4
  • Akira refit coming during S4. Not finalized if it will be a VA ship.
  • “Open PvP areas”?? (If we can get the tech worked out…)

Star Trek: Reunion
Cerberus Films Announcement
Teaser Trailer
All episodes will be available at: http://www.youtube.com/cerberusfilms

Starbase UGC’s contest:  Summer of Love
Complete rules & regulations…

Official Forums got a few tweaks. New subforums, etc.

————-

The Cure

Space Part 1
Bleh, kill borg. Easy.

Ground Part 2
General Tips -
* Go with somebody that knows where nodes are (frequently hidden)
* Pay attention to your leader!
* Ground Map is outside (avoid flanking, stay mobile)
* Engineers cannot use Force Domes (Bunker Kit) to much effectiveness

1) Equipment
At least 2 sniper rifles (for nodes, and exploits)
CRM 200 — best expose weapon, and adds slow effect
Tac – Squad Leader / Fire Team
Eng – Fabrication (Bunker kit is of limited use, but could still be handy)
Sci – Medic

2) Puzzle Tactics
* Brute Force
* Start, fail, restart (1 less spawn to deal with)
(mention “zero aggro” but that we didn’t use it)
* Drop toys between nodes, to draw aggro from beam-ins.

3) Boss tactics
Healer tank his face
He’s got a Chain Lightning attack (won’t use it if people are out of range)
TR-116 for End Boss (Target pre-order) — “Field of Fire”

SPACE – Part 3
Full Impulse IMMEDIATELY, to get to the space stations and eliminate the borg-ifiers.
If you blow up 4, the rest launch.
Try and release the Neg’vars first (farthest from you)

BOSS – Assimilated Carrier
Use AOE attacks to counteract fighter swarms


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Infected Perfected | STOked 85

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In the first of a 3-week long series of events, the STOked boys are taking you on an in-depth tour of the Borg Special Task Force missions. Up this week is a guide to “The Infected” which includes tips and tricks for painlessly eliminating the Borg drones, and their leaders.

Before we dig into that however, BIG NEWS landed this week regarding the impending purchase of Cryptic Studios by Perfect World International. Despite the community’s uproar over this news, we’re taking a more level-headed approach to the corporate nature of this acquisition, and intend to share our thoughts on why this could be one of the best business moves STO could potentially see.

Direct Download Links

HD Video | Large Video | Mobile Video | MP3 Audio | OGG Audio | YouTube

Subscribe via RSS and iTunes:


Our STOked App:

STOked App Grab the STOked iPhone/iPod App and download STOked on the go!


Show Notes:

PERFECT WORLD BUYING CRYPTIC
It was announced this morning that “Perfect World” has penned a deal to purchase Cryptic Studios for 35million Euro. 

Other links/Cryptic responses:
Compilation of pre-responses
Official announcement from PR Newswire

Thoughts:
J-RANT: Chinese Racism on Forums (for shame!)

F2P, Pay-to-Win
Star Trek IP in China?
“Angelica” 3D Engine — aging? Perhaps this acquisition is for the Cryptic engine?
PWE obtained Runic (makers of Torchlight) in 2009 and haven’t meddled at all.
R&D / Tech angle
“More importantly, Cryptic Studios’ highly reputable development team and its technology platform will further strengthen our well-established R&D capabilities.”
Jupiter Uniforms are here! C-Store: 280 pts
- Not a bad price for 5 new tops and pants.
- Pooooor Klingons…

TWEET LEAKS
- Earth Badge: http://twitpic.com/559m31
- Gatling Turrets: http://a.yfrog.com/img610/8388/62484048.jpg
- Qo’nos Courtyard: http://a.yfrog.com/img611/4751/dq60.jpg
- Exocomps to replace Drones: http://desmond.yfrog.com/Himg612/scaled.php?tn=0&server=612&filename=7xvjt.jpg&xsize=640&ysize=640
— REALLY, DAN? A picture of an EMAIL?! Now you’re just taunting us.

Enterprise-F Dev Diary (How The Winner Was Chosen)
- Includes a “clay model” with more angles to view (still a WIP)

Infected Tips

Watch the uncut full stream here & Part 2 here:

General Tips:
- If you’re new, get experienced players to lead you through. There’s plenty out there now.
- Voice chat is highly recommended. (Vivox coming soon!)
- Follow directions. Or if you’re leading, give clear directions that are easy to follow!
- Do not progress any dialog pop-ups until the Team Leader gives the OK, or does it him/herself.
- Do not go in unprepared! Make sure you have a solid spec that plays to the specific strengths of both your Space AND Ground abilities.

SPACE:
Zip around BEHIND the gate, and do not activate the two popups until the team is in position.
With high DPS, you may be able to destroy the gate in a single activation sequence.
If you destroy the gate without killing transmitters, you get better loot.
If you do not destroy the gate in a single activation, you will be faced with 3-4 waves of borg ships that get progressively more and more powerful with each wave.

Good Space Boff Abilities:
Hazard Emitters (practically a must-have)
Tactical Team
A lot of DPS/buffs/debuffs
Gravity Well — good for chain reactions on warp cores!

Tactical Cubes have a ~5km explosion radius. If you are trying to keep the Transmitters alive, and have a Tac Cube spawned, be sure to lure it away from them before destroying the cube.

Tweet Update:
Cryptic_Gozer Dan Griffis
Weekly STF Update… Infected space 85% complete. Battle to destroy the Transwarp Gateway is much more interesting now :)

GROUND:
Ground Weapons:
Tactical — Sniper(x2)
Engineer+Science — CRM200 + Melee

Ground Kits:
Engineer: Fabrication or Bunker Kit
Tactical: Fire Team or Squad Leader
Science: Medic (at least one on the team)… if you want to DPS, I recommend Geophysicist

Order of Ground Targets:
Interlink Node
Infected
Drone
Medical
(Protos? Can be cleaned up at any time after Medical. May despawn on their own.)
AFTER ONLY TACTICALS ARE LEFT, SWITCH TO MELEE WEAPON
Tactical
Heavy
Elite

FIRST BOSS: Ogen
Pull him OUT of his room, into the hallway.
He will stop and summon friends halfway through the fight. If you are in the hallway, they will not join the battle.

END BOSS: Manus
Get into the alcoves on the wall opposite from the entry doorway.
This blocks line of sight between group members (meaning, no heals!), which prevents her “chain lightning” attack from hitting more than one target at a time.

NEXT WEEK: “The Cure”
Keep your tips/guides coming! Jeremy is gonna try and post the best ones over at JupiterColony.com

Want to help the show?

Grab a shirt in the Jupiter Broadcasting Gear store!

Donate your CPU to help JB mine for bitcoins! Your idle CPU cycles can help us generate revenue!


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MeeGo on the N900 | LAS | s16e03

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We’ve stayed up all night by the light of fire, armed with only our amazing intellect to load MeeGo on all the various devices we can get our hands on. Find out if MeeGo is the platform of the future, or yesterday’s bad joke!

THEN – Linus lays the smack-down on Fedora, and we cover April Fools jokes from open source projects around the web!

Plus so much more!

All this week on, The Linux Action Show!

Direct Episode Download Links:

HD Video | Large Video | Mobile Video | MP3 | OGG Audio | OGG Video | YouTube

Thanks to GoDaddy.com for sponsoring this week’s show! Use our codes LINUX to save 10% at checkout, or LINUX20 to save 20% on hosting!



Episode Show Notes:

Runs Linux:
Saxcore Samuel Saxon

@ChrisLAS Stuck for a “runs linux” on LAS this weekend? My Oscar winning workplace runs linux! http://bit.ly/hEPwqU

Linux Fest Northwest Meet-up:
http://linuxfestnorthwest.org/
April 30th – May 1st
Bellingham, WA
Follow Bryan and Chris on Twitter to track us down!
Jupiter Colony has a thread started to organize, give it a shout!

Android Pick:
Amazon MP3
Vendetta Online
Android Picks so far, thanks to Madjo in the IRC Chat room!

NEWS:
Linus Breaks out his Mofo Pimp Hand over Flash
NASA hosts its first open source summit - Action Followup!
Apple Ditches SAMBA in Favour of Homegrown Replacement
UK Government Backs Open Source In Budget Cuts

GEdit + Telepathy = YES PLEASE
Ubuntu App Developer Week is upon us
Jupiter… OS.  WHUT.
Review: Elementary OS 0.1 “Jupiter”
Summary of FOSS Online April 1st 2011 Pranks
N0… is not real.  But AWESOME.

MeeGo on the N900:
Official Install Guide
Official Dual Boot Guide
MeeGoExperts.com’s Install Guide
How to (properly) install the MeeGo SDK and Emulator in Ubuntu and Debian Linux
SyncTerm and FireFox 4 for Maemo/N900
openSUSE Smeegol

B3 $71 USD /  50 EUR Discount:
Simply email to discounts@excito.com with the exact
model they want to buy.

Treat your self with our new affiliate, ThinkGeek!


Download: