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LeanXcale is an HTAP database developed by a company with the same name, LeanXcale. LeanXcale is a Full SQL and Full ACID distributed database. It supports both operational and analytical workloads. On the operational side, the main feature lies in its ability to scale transactional processing to millions of transactions per second and 100s of nodes in a linear way. On the analytical side, it has a distributed OLAP query engine that works directly on the operational data, thus delivering real-time analytics. The database provides standard SQL and a JDBC driver for applications to access it.
Architecture
LeanXcale can be classified as a NewSQL database. LeanXcale runs on a cluster with a shared nothing architecture and can scale out to 100s of nodes. The database has three main components:
* Query engine. The query engine scales out for both OLTP and OLAP workloads.
* Transactional manager. It scales out is able to achieve many millions of update transactions per second on arbitrarily distributed data.
* KiVi Storage Engine. It is a distributed relational storage engine with a key-value interface.
Query Processing
LeanXcale has a distributed query engine. The query engine is able to run queries in two different modes: OLTP and OLAP. In the OLTP mode the query runs on a single query engine instance. This approach is adopted for small queries to scale out to very large numbers. In the OLAP mode, the query runs in a number of query engine instances that aggregate the power of multiple nodes to answer analytical queries in online times. The query engine itself is stateless, it just has session state. Data is accessed through the KiVi storage engine.
Transactional Management
The transactional management is based on a radically different approach. ACID properties have been decomposed and are scaled out independently but in a composable manner. Basically, the transactional management is able to commit fully in parallel all transactions without any coordination and then, it regulates the visibility of committed data so only fully consistent snapshots become visible to the applications. The transactional manager can handle 100s of millions of update transactions per second and any number of read-only transactions.
KiVi Storage Engine
KiVi storage engine is also a technology created by LeanXcale. KiVi is a relational and fully ACID key-value data store. Data stored in LeanXcale database can be accessed through any of the two interfaces. The traditional SQL and JDBC driver or the KiVi key-value interface. The latter has the advantage that avoids all the overhead of SQL processing and provides ultra-efficient access to the relational data. KiVi provides standard get and put methods (with a relational schema), but it also provides a scan method with predicate that is equivalent to the SQL statement SELECT with just a predicate. Inserts through the key-value interface are extremely efficient.
KiVi is based on that is integrated with the transactional manager. Transactions in KiVi are fully distributed, that is, they can access data in any arbitrary number of nodes and tables, and rely on the LeanXcale ultra-scalable transactional manager.
KiVi exploits vectorial and SIMD capabilities of current commodity CPUs like Intel and AMD. This vectorial acceleration is used for improve the performance of searches and predicate evaluation.
KiVi also support columnar storage bringing the corresponding acceleration for analytical queries that only bring to memory the columns accessed by the query what saves an important amount of resources (IO, CPU, memory) when processing queries over tables with large number of columns.
Data in KiVi is distributed in horizontal fragments that correspond to range of primary keys.
KiVi is elastic. It allows to move data regions from one server into another. This feature can be used to balance the load in an online manner as well as to provision new nodes and decommission nodes when they are not needed anymore.
Performance
Evaluation with benchmarks following the TPC-C specification on different cluster sizes has shown linear scalability with up to 100 nodes. Evaluation with hybrid workloads TPC-C plus analytical queries inspired on TPC-H over the TPC-C database has shown that LeanXcale can provide full isolation between both workloads.
Market Analysts
LeanXcale has already been featured by the market analyst 451 Research and appears in their Total Data market analysis report.

The response to the 2016 Lahore suicide bombing was widespread.
Pakistan
President of Pakistan, Mamnoon Hussain; Governor of Punjab, Malik Muhammad Rafique Rajwana; and Chief Minister of Punjab, Mian Shahbaz Sharif, condemned the attack and announced three days of mourning. Business leaders announced that all shopping malls, bazaars, and markets in Lahore would be closed on 28 March, the day following the bombing. Several news agencies in Pakistan, such as the Express Tribune, changed their websites to display everything only in greyscale. The Pakistan Army said it will begin military operations across Punjab in response to the bombings, targeting militants, their facilitators and their hideouts.
International reactions
The bombing was condemned and condolences offered by the leaders and spokespeople of many countries:
* : Algeria strongly condemned the attack and called for an "urgent need for the world's cooperation in a bid to efficiently fight against terrorism", saying that Algeria stands in solidarity with the Pakistani people and government and extending its condolence to the family members of the victims involved.
* : Prime Minister Malcolm Turnbull extended his "condolences, prayers & solidarity ... with the victims & their family & friends." Kings Avenue Bridge in downtown Canberra was depicted in Pakistani flag.
* : Brussels Mayor Yvan Mayeur led a minute’s silence in city hall for the victims of Lahore.
* : Prime Minister Justin Trudeau extended his "thoughts and prayers ... with all those killed or injured." On 29 March Trudeau also called Nawaz Sharif. Toronto also became the first major Western city to light its public structures in Pakistani flag colours. Toronto Mayor John Tory tweeted a picture of the Toronto sign front of the Toronto City Hall was lit in green and white, the city council also hosted a vigil.
* : President Xi Jinping and Prime Minister Li Keqiang condemned the attack claiming that China "firmly supports Pakistan in its fight against terrorism and acknowledges its sacrifices in this regard."
* : President François Hollande expressed “France’s solidarity” with Pakistan. Despite public outcry the Mayor of Paris refused to turn the Eiffel Tower in Pakistani flag claiming that "The attacks in Brussels have a special resonance because we have an exceptional link with Brussels".
* : Chancellor Angela Merkel condemned the terrorist attack in the strongest terms. In a telegram of condolence to Prime Minister Sharif she expressed her "great sympathy" and assured that Germany was "on the side of Pakistan in the war on terror".
* : Prime Minister Narendra Modi called his Pakistani counterpart and expressed solidarity the victims of the attack. The hashtag #PrayForLahore remained the top trend in India.
* : President Joko Widodo condemned the attack and said "any acts of terrorism cannot be justified for any reason". Jokowi also sent his condolences to all families of the victims.
* : Foreign Ministry spokesman Hossein Jaberi Ansanri strongly condemned the "terrorist attack" and expressed sympathy with the victims.
* : Foreign Ministry spokesman Ahmed Jamal condemned and denounced the attack. The Ministry also expressed its solidarity with the government and people of Pakistan, stressing the need to "silence media outlets that support such extremist ideology".
* : The government through its Ministry of Foreign Affairs denounced the attack as "abhorrent" and reaffirmed full solidarity with the government of Pakistan.
* : The Government of Malaysia condemned the attack and expressed its deepest condolence and sympathy to Pakistani government and all victims families involved.
* : The government strongly condemned the attack and said "terrorism must be dealt with firmly and resolutely".
* : The Department of Foreign Affairs condemned the suicide bombing and described it as a "reprehensible and cowardly act that has no place in civilised society".
* : The Government expressed strong condemnation of the terrorist attack and supported the Pakistani Government's efforts at fighting terrorism.
* : President Mariano Rajoy condemned the attack through her Twitter account, saying that "the attack made it clear that barbarism knows no borders".
* : The Government expressed its condolences to the Pakistani government, people and families of the victims, condemning what they described as a "coward terrorist attack".
* : President called Nawaz Sharif and conveyed his deepest condolences on the loss of lives in Lahore terror attack.
* : The Government condemned the attack and expressed its solidarity with the Pakistani government.
* : Prime Minister David Cameron expressed his sympathy over the attack and promised to help Pakistan.
* : National Security Council spokesperson Ned Price sent his deepest "condolences to the loved ones of those killed, just as our thoughts and prayers are with the many injured in the explosion." Omni Hotel in Downtown Dallas was depicted in a Pakistani flag as a tribute to the victims, the gesture was termed "rare".
* : Pope Francis appealed to Pakistani authorities to step up security for religious minorities after the "abhorrent" suicide bombing, saying "I appeal to the civil authorities and to all the social constituents of this nation to do everything in their power to restore safety and serenity to the population, particularly the most vulnerable religious minorities". He also labeled the attack as "fanatical violence against Christian minorities".
* : The Government strongly condemned any "terror attack on civilians". Its Foreign Ministry Spokesman Lê Hải Bình said Vietnam shares the pain and great losses suffered by the Pakistani Government, citizens and families of the victims as well urging that the terrorists should be punished justly.
International organisations
* : ASEAN strongly condemned the bomb attack and extended its deep sympathies and condolences to the government and people of Pakistan, especially to the families of the victims. ASEAN also underlined that terrorism in no circumstances should not be linked with beliefs or religions.
* : High Representative Federica Mogherini denounced the attack that "decimated peaceful families" and reaffirmed full support to the government of Pakistan.
* : The OIC condemned the "barbaric bombing". Its Secretary, Iyad Ameen Madani expressed condolences and deepest sympathy to the families of the victims and wished a quick recovery to those injured as well supporting the government and people of Pakistan in confronting terrorism and crime.
* : Secretary-general Ban Ki-moon strongly condemned the suicide bombing and called for the perpetrators to be brought swiftly to justice. He also extended "his heartfelt condolences to the victims and their families, and expresse his solidarity with the people and government of Pakistan".
Others
Groups including Amnesty International condemned the attack calling the attack 'inexcusable'. Human Rights Watch Head Kenneth Roth also condemned the attack. Many criticised Western bias favouring coverage of a prior bombing in Brussels over the bombing in Lahore. Vox Media noted that the Lahore bombings weren't greeted with the outpouring of tributes and vigils that accompanied the attacks in Brussels. The Independent also identified this bias.
General Secretary of the World Council of Churches, Olav Fykse Tveit, stated that "The tragic loss of life from these deplorable acts of violence targeting the Christian community in Pakistan reveals once again the tremendous challenges and heavy sacrifice Christians bear as they strive to remain faithful to the gospel values of life, justice and peace".
Facebook activated Safety Check for victims of Lahore however it wrongly asked people if they were caught in a bomb attack in Pakistan who where living in Europe and the US.

Deborah Yarchun is a New York City-based playwright. Her play A Pickle was the fastest-selling show in the 2017 Minnesota Fringe Festival.
Biography
Deborah Yarchun was born in New Jersey and grew up primarily in Austin, Texas. Her play Freezeframe won the 2006 Young Playwrights competition founded by Stephen Sondheim. Yarchun attended Drexel University in Philadelphia and received an MFA in Playwriting from the University of Iowa. She later moved to Minneapolis as a Jerome Fellow at the Playwrights' Center and then to New York City.
Awards
Yarchun has been the recipient of numerous awards, including:
* Jerome Fellowship (The Playwrights’ Center)
* an EST/Sloan Commission
* The Kennedy Center’s Jean Kennedy Smith Playwriting Award
* the Kernodle New Play Award
* Tennessee Williams Scholarship
* the University of Iowa’s Richard Maibaum Playwriting Award
* an Iowa Arts Fellowship.
Works
* Freezeframe (2005)
* Portmanteaux (2009)
* Painted Desert (2011)
* Spinal Alignment (2011)
* Portrait of an Artist from the Perspective of His Pears, or Luscious Butts (2012)
* The Man in the Sukkah (2012)
* Perception Play (2013)
* The Aleph Complex (2013)
* The Starfire Dance (2013)
* Bomber's Moon (2014)
* Great White (2014)
* Tectonic Mélange (2014)
* A Pickle (2015)